I did, got my HD RSN, which was 100% worth my switch.
Saved $150 via $10 month credits, and got two HR20s for $199 ea and one for free. The third one was due to complications on the start. Also got a couple $50 immediate credits (install complications/delays) and 10 free PPVs. I used the Sunday Ticket w/ Premier offer this fall. The current offer is ok, but they sometimes run online promos like the $150 credit.