Geof - I think you'll find opinions will very from area to area. I had Comcast HD installed right before the Superbowl. Frankly that's the most trouble I've had with HD. Parts of the Superbowl were unwatchable, but I think my experience was local for I have not heard much from anyone else about it.
Aside from that I have been pretty satisfied. Watched all the Daytona 500 in HD and I am not really a race fan. The only other complaint I have is
Comcast getting off their rears and getting WB and KMGH HD.
As for packages I have the digital plus and temporaly HBO for a $1 more. The promo for HBO is about to run out and we won't keep it. With this the HD channels we currently get are Showtime, HBO, KUSA, KCNC, KDVR, KRMA, SZHD, Max, INHD1 & 2 and ESPN.
The guide is ok, but I much prefer Beyond TV's guide on my HTPC.
"The road to success is often paved with failure"