I use blank news paper   its cheaper  faster to clean  and   it dosent make such a mess

Why are you thinking of switching?  I use aspen and have not had problem with molding.  But I don't mist, I have small hand towel folded in a square that lays on top of the screen that I keep damp/wet.  It has kept the humidity perfect.  However, new enclosure will be ready this weekend and I had humidifier attached to it so I will watch for any changes with using the aspen.  But up to this point it has been good.  I tried 3 diff ones and liked the aspen the best. 

i use paper towls for my smaller snakes and i use newspaper for my bigger snakes.  cheap and easy to clean and monitor.

Given the choice, use cypress in a high humidity setup.

I use cypress mulch in all my adult chondro enclosures, and paper towel for neonates, both work great in a high humidity enclosure.

Both Aspen and Cypress are quite resistant to mold.

Generally speaking, Cypress is the better choice for tropical animals because it holds humidity better than Aspen, which dries out more quickly.  Both are great bedding choices.  Aspen is cheaper, but Cypress makes maintaining higher humidity easier.

Hope this helps.  =) 

In high humidity, you'll want to stick with cypress hands down. Aspen is pretty much either wet or dry, no real middle ground. I use a cypress/eco earth mix with my Leopard tortoise, works fantastically for holding humidity/moisture, whereas whenever there's a water dish spill with my snakes (for whom I use aspen), it's just a sloppy wet mess no matter how minor the spill.

I opted to go with a sub-layer of eco earth with cypress as a top layer. Hopefully that will solve my humidity problem.

I will add this warning, based on personal experience with eco-earth.  I know some e-e lovers are going to slam me for this, but this is what happened to me.

Once upon a time we were having humidity issues and decided to try eco-earth because we'd heard that it's really nice and moist.  We bought a couple bricks, soaked them in water, drained the water, and had a nice damp substrate.  We put it in the enclosures, and it seemed great.  And then, a couple hours later, the top layer of the stuff was bone dry.  We sprayed it with a watter bottle.  A couple hours later, same thing...dry and dusty.  We mixed it around with the still damp bottom layer.  A couple hours later, dry again.

The stuff is like a sponge.  It will absorb a hell of a lot of water, but it also releases that water and dries out VERY fast.  And when it dries out, the finely ground coconut husk is very very dusty.  And that's the problem.  Within a couple weeks, we noticed a couple of our animals were showing signs of early stage resperatory infections.  We scheduled an appointment and took the animals to a well known herp vet in our area.  She asked all the usual questions while she was examining the snakes:  What are they kept in, what are the temps, how's the humidity, when's the last time they ate, etc...  And she asked if we'd made any husbandry changes lately...so we mentioned the switch to Eco-Earth.  People, you should have seen the look on her face.  She handed our snake back to me, said she'd be right back, and came back with a couple of needles full of antibiotics.

She explained that they do indeed have early stage RI's and that a short course of antibiotics will knock it out before it takes hold.  She explained that the most likely cause was the bedding switch.  She said that when that top layer dries out and gets dusty, that snakes, with their nostrils so close to the ground, inhale the nearly microscopic bits of dust.  It gets in their lungs and causes the infection.

Now, I've told this story in herp communities before, and Eco-Earth fans have raised holy hell.  "It must have been a coincidence!  I've used eco-earth for years with no problems!"  Fine.  Lucky you.  All I can tell you is that's what the doctor told me, and that no animal had developed an RI in our care before that, and no animal has done so since.  I believe she was right, and I avoid the stuff like the plague.  Take it or leave it.  =)

aspen and paper towels are best for most common species of dry snakes around here. i haven't used cypress before, but i probably will if i get a ribbon or garter snake that i've been wanting for a while.

I would go with aspen for BPs, since they require a drier environment. I personally use paper on most everything, but I have used aspen for MANY years (I have a few carpets on it now) with zero complaints. The advantage to using aspen is security. Some snakes like to burrow into it to feel more secure and comfortable. If you use paper with a BP, they need to have at least one hide spot that they can fit snugly into. I have friends that breed BPs and use aspen for adults. I have used it for countless species over the years, but mostly for colubrids. Carefresh is another dry bedding I like, but it is expensive... especially if you have a large number of animals. Paper is the easiest and most sterile substrate (if changed regularly), but if you only have a few animals, aspen is a great choice. They will feel more secure and be less prone to stress.      -p-

Depends upon the species.  For my arboreals, they get sphagnum moss but I used to use cypress.  Holds humidity well and doesn't mold easily.  For terrestrial snakes I use aspen.  This would be the cornsnakes for instance.

They both pretty much equal.... I have used both over the years..... If you can get a good source of Cypress.... I would use that over the Aspen anyday... but I just can't get the consistency that I can with Kiln dried  Aspen.....    Now either of these are still better than using Newspaper.... which is just plain lazy IMO....    yes Newspaper is easy to keep clean.... and cheap....  but it is a poor substrate for snakes.... plain and simple......     I challenge the people that use just newspaper......  strip your bed down to plywood.... and just lay some paper over it.... sleep on it for a few nights....     then put on some socks and try running across a skating rink floor......  that is what it is like for a snake to try to crawl on newspaper.....