I'm with you Biggles. I'm at home a lot and use ISDN on the daytime Lo-Call and free evening calls. It's advertised at 2p/min in the day; but frequently disconnects several times within the first minute which works out at 5p/min. Like you a normal session involves several reconnects. If this happens to us all once or twice a day, it represents a lot of extra money. I don't subscribe to conspiracy theories normally, but it sure as hell looks suspicious to me.
Funny thing, its been a lot better since I complained to BT engineers a couple of days ago. They claim, of course, that the line was Okay but that the problems must have been with BTInternet.
Compuserve? No problem. Solid as a rock; but its an 0845 number and no free evening calls. But I still go to it in desperation sometimes.