What is your favorite? I'm really disliking the Ilford fiber based. It's not flat right out of the box. It's a pain to get in the easel, and unless your developer is 2 inches deep you have to flip and poke to make sure it is covered until it is soft enough to lay flat. Drying is a whole other monster. I use book binding tape and it always seems to pull out on one side. I lay the glass flat so the moisture stays even. After drying I lay it between some matt board heat up with an iron then lay 18x18 ceramic tiles on top for a day. Once out of that it just curls right back up.