I use email transfers regularly for stuff I sell directly for resale, and I love them! the only complains I have are the daily, weekly and monthly limits. I have to work around and use 2 and sometimes 3 different accounts to receive money.
I'm considering using it with my ebay sales, however since most of my listings are in USD that requires using exchange rates. Still beats the hell out of any other payment form, because it's immediate cash into your account and cost you (the seller) $0.00 ! (that's an extra 2.5% - 3% in your pocket)