I use it pretty regularly... It depends on the network. Also, some shows have commercials and or restricted ff initially, and then after a certain timeframe there is a new version put up that can either have much less commercials and/or the ff restriction removed.
Rewind, Pause and the five second hop back work always.
Cable networks are generally not very restrictive
No restrictions on Premium/movie channels
fox is strict and generally has the shortest time that shows are available and usually have no reduced commecials and no ff.
Abc sometimes right away, usually after a week or so of airing reduces the commecials down, but no ff
CBS shows are shorter than 60 minutes, with less commercials, no ff
e.g. 54 minutes for a 60 min show
Nbc cuts commercials out right away, no ff. 46 mins for 60 min
-Roamio Pro/Slide Pro
-Stream (Gotta go unplug the sucker one of these days!)