I had 4 tuner capability with my Comcast DVR and two other one tuner DVR. Comcast went digital and I was down to two tuners which wasn't acceptable. In December 2012, I bought an xl4 connected wirelessly and it was as reliable as a toaster. Never had any outage for over a year. The problem was the Netflix interface sucked; captioning sticking and getting stuck in Netflix and the only way to get out was yanking the plug. I didn't want to wait for Tivo to get around to fixing the Netflix captioning problem on the xl4. I heard that the issues were fixed on the Roamio and that is true. The Netflix interface was much better on the Roamio. The reliability of the connections to Tivo and Netflix is a joke. I've spent time and money trying to resolve the issues but it is a lost cause. My only hope is that it is a software issue that will eventually get fixed. There are a lot of posts here that the only way you can get a Roamio to work reliably is with a hard wired connection. My XL4 didn't have a a problem with wireless and if I knew the Roamio was so flakey, I would never have bought it and even when the connection to Tivo is good, I can't rely on being able to connect to Netflix.