I have two of these chargers and have bought a few others for colleagues and we've all been rather impressed with them.  They're reasonably well-built and work.  I didn't have any of the quality control issues that one reviewer had with the battery terminals.  I normally use Sanyo Eneloop rechargeable AA batteries with mine and haven't had a problem with connections.  I use it to charge my PDA, personal Motorola Razr phone, and corporate Blackberry. (Thank you God for whoever decided to finally standardize some devices with the mini-USB connector!)  It does seem to take about 1-2 hrs to charge up the devices, which is as long as it normally takes when they're connected to their native chargers.