Excellent product :)
free version was already enough for my needs, but still I bought the complete because these guys *deserve* it :)
ebook reading is very fast, highlighting is easy once you understand how it works (tap and keep tapped the first word, then go up and down, once you leave the monitor wait 1 sec until the bar appears - you can still change the selection)
pdf reading is *great* , zoom is very functional and many pdf can be highlighted as well
it is somehow slow when it comes to loading the list of the available books (or when you leave a book and want to come back to the list), but when I say slow I mean 3 or 4 secs... you do not fall asleep while waiting, I mean!
also, panning down a zoomed pdf can sometimes be "slow" (half a sec before showing correct letters). still, nothing that really ruins your reading experience.
overall look is nice and relaxing.
count it among the top 5 "must have" application for android. IMHO the best e-reader available.

ps. tested on a Creative Ziio 10", firmware 2.00.12