I purchased a 256mb card from them last year. At first, I had a problem getting the card to run as fast as some others had. We found out that the firmware version had a lot to do with the speed of the card even though Minolta denied this fact. The people at http://www.powerinnumbers.au were very understandable while I worked with Minolta and others to get the firmware ugrade installed in my camera. They even offered to refund my purchase.
Well, I finally got my camera upgraded and the card works great.
My experience with them is very good. They are very responsive but you do have to allow for a huge time zone difference if you have any questions for them.