I’ve had YTTV for about 18 months, after having Sling for a little while. YT is much better. Its definitely worth the $ you save, even with the slight live sports lag and the inconvenience factor. I can stream on 2 devices at the same time without any buffering on 50mbps. I could probably do 3 devices just fine, but have never tried.
we use to stream 2 streams on 12mbps with no issues. The other devices would get slow once in a while like our phones on WiFi but the Hulu live/YTTV never had many issues. Now we have 75/75 fiber and that has been awesome.