Bought it yesterday.
In fact I'm quite disappointed, compares to Pixa.
1st, Pixave doesn't support live folder mode.
You can only either choose "manage mode" which copies every image file into the library. or the "preview mode" which only creates some thumbnails, any change you make to the original folder, add some pictures, for example, won't show in Pixave. You can't drag some pics into Pixave hope they can be copied to the folder neither.
2nd, Pixave is much slower than Pixa, I mean like 5 times slow...
When I tried to import files to Pixave, my external HDD growled for quite a long time... while Pixa finished shortly.
3rd, the Library file size is large. I imported 29 small image files to both Pixa and Pixave. Pixave created 876KB files while Pixa created just 415KB.
Sad thing is, Pixa's author hasn't update it for quite a long time... the team looks like still active, but Pixa is not on their priority list.