I have a MAG 254, works great with a rocket subscription, picture is great. My wife uses it too, very simple and straight forward. Had free to air for years and loved it to, no more dish or computer to fool with.
If You have unlimited internet, IPTV is the way to go, but If you have High speed DSL with limited bandwidth/month like I do, then IKS is more suitable for less consumption and get to use your satellite dish. My mag is great as a backup when IKS is down and still get to watch some other programming not available on IKS.