I am very happy with most things Tablo. After years of DirecTV and U-Verse TV with DVR service, Tablo performs quite well as a whole-home DVR.
However I have difficulty with Tablo in returning to Live TV after previously pausing or rewinding live TV. I can press fast forward till the cows come home, but I always still have to press OK before I return to “motion picture”… and I am never sure if I have reached full live TV or if I am still on “tape-delay” (if only by a few seconds). (With DirecTV or Uverse, just holding ffwd would ffwd as far as it could then seamlessly transition to Live TV).
While I use Tablo on iPad and Linux Chrome, I mostly use Roku 3 (particularly with reference to “ffwd button”.)