I don't know about quality of any particular brand. I like the bags with the softer 'zipper'. I also like the looks of the bags with the fabric covering. I liked the size and look of the 'under bed bags' since they would be visible under my quilting table.
I have also found I can suck out air and store small projects and fabric in Hefty's Jumbo Zip Top bags. I fill it up, zip it almost shut (leave about 2-3 inches open) then I lay it on a table top and lean as much air out as I can. If leaning on it doesn't work, I roll it up to get air out. They stay pretty flat, too, so I guess the most important thing is to get the air out and shut quick.