The BeBook Mini is the same as the EZ Reader Pocket Pro (both are Hanlin V5s). There are lots of threads about the Pocket Pro in the EZ Reader forum. See for example
My Review of Astak 5" Pocket Pro and, for the warts, see
A different question, do you regret your Pocket Pro Purchase?. Note that the BeBook won't have the paint issues because it does not sell colored versions.
Some have not been happy with the number based user interface and the inconsistent level of support between ebook formats. On the other hand there have been a huge number of Hanlin V3s sold world wide and the V5 is a hardware upgrade over the V3 with a smaller screen. I recommend the V5 as a well constructed device with a SDHC card slot for expansion and good firmware that is being constantly improved.