Got upgraded to FTTC today.
My line is made from poorly-cooked spaghetti, and ADSL2+ speed has dropped progressively from about 15Mbit to 6 over the course of a couple of years.
It looses sync several times a day.
It really needs a Shaun the BT Slayer on it's miserable ass, but that's for another day.
With FTTC, I'm back up to 15Mbit, and we'll see how stable it is.
Oh, and the BT OpenRetch VDSL modem supports baby-jumbos, so I can haz 1500 MTU from my PPP endpoint machine! Yay!