DYI: Epoxy Garage Flooring

[StanAE86]

Technically "Garage Chat", I was wondering if anyone had experience with do-it-yourself epoxy floor paint? Although I'd like to have someone come in and do the garage floor, money is short. However, I'd still like a nicer than average garage floor. This week, Lowe's Home Improvement (they're like Home Depot) has a sale (see page 23 of ad):

$23.94/gallon
Interior/Exterior Seal-Krete Epoxy-Seal

or

$54.97/gallon
Rust-Oleum Epoxy Shield Garage Floor Coating Kit

I've seen the Rust-Oleum "kit" advertised in the Big Three car mags before (R&T, C&D, Motor Trend), but don't know anyone that has actually done their garage floor themselves. I have also considered the one made by Behr, sold at Home Depot for $100 in a 5 gallon bucket.

I'd like to do it, but if it's absolutely terrible, I'll skip it and try to save up to have it professionally done someday.

Thanks for any input.