I think youre going to be fine. I can tell that you went a little cheaper (not insulting you. however you must keep in mind that you get what you pay for). Herbies offers free autoflowering seeds on his autofloweringseeds.com website (for future reference). I can tell you that vision is a reputable company. So far, all seed companies on herbies wont let you down. Good luck!!!!
I think you'll be good too. I'll be very interested to see how the XL strains yield compared to normal versions.
As for cheap seeds, I'm a tight bastard and I've also heard some pretty good things about Speed Seeds, so I'll be purchasing ALL their autos in the next few weeks. At £2.50 a seed, I'll be happy with anything from them Shane attitude don't stock them, as I like a freebie! Pick and mix currently dont have the Auto Amnesia though...
Will you be updating us with progress on here man?