i generally don't buy v1 products, i prefer to wait for v2 or v3, after the bugs have been worked out. i made an exception here and got what i expected, an ok, but buggy, product. sometimes it works great, sometimes it's very slow, sometimes it just doesn't work, sometimes it needs to be re calibrated and sometimes that process is frustrating ... it's gotten better as the software has been updated, and it's great when it works