I voted mostly satisfied. For the $299 I paid for the USB version, I really would like to be more than 'mostly satisfied'.
I've had mine for 3 months. For the first month it was very unstable, with frequent tuner crashes and partial recording errors. After updating to the beta firmware V. 126.96.36.199, it is much more stable.
However, it is not stable enough to return my cable co. DVR. Mine is not a dedicated HTPC, it is my everyday triple-monitor desktop. So for the time being, I am 'relatively' satisfied using it to watch HDTV on one of my monitors, while using my PC for everthing else.
I was considering building a dedicated HTPC, but my USB tuner is not stable enough for that yet. Hopefully future firmware updates will make it so. If not, I'll try a HomeRun Prime if they keep dropping in price.
Living Room: Denon X4000, XPA-5, Polk RTiA9, CSiA6, RTiA3-wides, FXiA4, OWM3, SVS PC12+, 4 Shakers, Epson 5030, VApex 92”, Sony XBR9 52”, PS3, Xbox 360, Darblet, Harmony 1.
Bedroom: Denon X2000, Polk RTiA3, CSiA4, RTiA1, Yamaha SW315, Sony XBR-55X850B, Sony BPD-S590, Xbox 360, RPi2-RasPlex, Harmony 510.
Home Office: Onkyo 707, Polk LSiM 703, LSiM 704, Monitor 70, Yamaha SW315, Turntable, Triple Monitors, Harmony 610.