Right, they have come a long way, I think the main issue at this point is either user error (not charging/hooking up wrong etc).
wut if i have amazon prime? oh and make sure to have a portable air compressor. the most useful thing ever to fill your tires. you can buy these on ebay for about 25 USD.
Also make sure you have the quick-change connection...the pressure blower attachment is very handy for general tool cleaning purposes.