Yes, mine hasn't been great.
Had a spell of it dropping the connection - twice for much longer than a brief spell too. If I check something like 'what's my location', I seem to have moved (routing I suppose). Tells me I'm in Edinburgh now, earlier in the week it was Colchester, and previously for a long time, near Kensall Green, which used to be very good, and even better was a long spell in the Westminster area.
Richard at tech services was very helpful, but although the connection has been fine this past two days, I'm getting delays in email downloading, images loading slowly, even pages hesitating before appearing.
Everything speed-wise and SNR looks pretty good - just isn't working as well as it looks.
I do know a lot of maintenance/repair work has been happening lately - could that be the cause I wonder, or perhaps somebody working on the system altered something ..who knows. Hard to tell, but it's not perfect at all.