I bought one of these Stash W950 ebook readers (similar to the Delstar Openbook in US I think) from OfficeWorks last week and, for the money ($A129, or ~$US110), I think it's great.
I've downloaded quite a few Epub freebies from the place recommended on the box,
http://www.ebookmart.com.au and so far they all seem to come across very well. They do sometimes miss a letter at the end of a line every few pages, but this is no big deal. Even my Kindle does this with sometimes with some freebie books.
I'm not sure why some are having backlighting problems. Mine seems very good, even at the 2nd from brightest setting and I have to turn it down a bit in a darkened room. For bright ouside light, the white letters on black background option works pretty good. Page turns are about twice as fast as my Kindle k2i.
The best features (and why I mainly bought it) is it's MP3 and Video player. It has 2gb internal memory and can take up to a 16gb standard SD card (I've currently got an 8gb card installed). Both of these features work very well (much better than my current irivers MP3 player). There is an experimental mp3 player on the Kindle but it's terrible.
I cannot see this replacing my Kindle k2i as a regular ebook reader but I'll probably pack it around on some trips to avoid packing both the k2i and a mp3 player. Also, I like that this can import (non-DRM) where my k2i cannot (without converting anyway).
Not a bad option for a first time E-book buyer who also wants to use the MP3/Vid features.
Anyway, just my $0.02 worth.
Edit; After playing with this unit a bit more and having lots of difficulties getting videos to play as well as trying to read poorly formatted ebooks, I returned this unit to OW today.