Advertisements I purchased an S3 early on , was aware it didn't support TTG or MRV, and was/am okay with that. I also have two other S2s. The next TiVo unit I buy will have to support HD and MRV to replace one of my S2s. I won't be buying another TiVo that doesn't support MRV. I'm sure I'm not the only person out there who requires either TTG or MRV.