Has anyone else been using the Print-n-Press transfers? These are the first ones I"ve ever tried and they're not coming out well

I've tried 3 shirts with 3 transfers.. the first one was mainly just a "test" shirt... cause it was mostly spandex... and the image printed out very dark as it was ... but part of the edge of the design kinda pulled up and there are creases through the shirt.... so I did another one last night... a 100% cotton one... and that one didn't turn out at all.... like the image didn't stick.. and then I was thinking I could salvage the shirt when a small part of mickey's head stuck down

The rest of the image didn't even attempt to stick (although the transfer paper did stick to the shirt.. just not the image) and when I pulled it back it was all crackley. I think I might switch to the Avery that I see most of you using.. I just hate to waste the $20 i spent on 10 transfers.. ugh.