I've seen the same thing with low signal strength stations, but I like the fact that MyHD does it's own mpeg-2 decoding. This greatly reduces the hardware requirements for the PC. It can also do QAM which is a real plus.
I highly recommend the MyHD-130 card. Very little CPU usage while recording and playing back video. Two RF inputs for a combination of Cable QAM tuning and OTA tuning.
I love mine and would definately purchase it again.