when i was on 20mb bb the STM was annoying, but on 60mb or 100/120mb bb not so much even at 25mb-50mb speeds its still much faster then what an BT line could provide
you can still download 12-13 GB an hour you not been limited on the amount you can download (unless your going nuts downloading over 1000gb each month then you mite get an letter or an call)
i am mostly fine with the STM my self but not to happy about the TM of Usenet (there TM for p2p seems to have no affect)
i agree the STM on the upstream is little hash (triggering the STM on upload or download STM's both of them)
all i say is be happy they do not cap it to something like 250gb-500gb per month like in the USA, whould i be really happy if VM had no STM yes but due to there network setup it needs to be done (Openreach do it at there exchanges when the backhaul pipes are running hot, every ones speed drops to keep packet loss away)