In the past I have found pre-cuts not to be cut correctly, thin, etc. So I've quit buying pre-cuts and just cut from my stash. True, it's a lot more work but I know they're cut correctly plus I like to starch all my fabrics before I cut into them so I'm able to do this too.
The only pre-cuts I found to be worthy of my business is from Jinny Beyer's site. You know her fabrics are a very good quality and I do have some of those yet to use up.