1) It's not multilanguage. Tried to enter a couple of books in a non english language and the characters were wrong.
2) It has problems with my template (a rocket theme one) and from what I saw from the forum the problem is recurrent.
If the problems do get resolved I will definitelly go for the Pro version which looks awesome (at least on paper) but for now it's a no go
1) It's not multilanguage.
It there exist multi language and now supported dutch, english, french, german, germani, italian, russian and spanish languages.
Maybe you need to read documentation.
2) It has problems with my template (a rocket theme one)
With Joomla Default template - all work excellent. maybe will need check self template first.
a) There was an overlap of my site's logo with lightbox
b) I couldn't translate the text in my site's second language.
I contacted the author without having many hopes (after all it is a free component) and to my surprise he replied almost instantly sending me a new version that solved my first problem.
The second problem was a bit nastier so Mike followed my steps almost daily, he sent me another version and finally gave me the solution I needed and all this without asking for anything in return.
This is definitelly the BEST SUPPORT I ever had and given the fact that this is also a great mambot I give it an excellent rating (as well as a small donation)
Excellent work Mike!