Well, we're a few weeks into the 1 hour cut off. Has there been a reduction in the engaged tones, absolutely not!!
It has made things worse for me, cos after an hour, I had to keep an eye on the timer, and in the middle of an MSN conversation, announced that I'd be right back, and 15 minutes later, I was back.
During this 15 minutes, I was trying to reconnect, and all this does is gives an hour online time, then you have to go through the same thing again.
I don't mind the 1 hour cut off, if it was in aid of stopping the engaged tones, but all that has happened now, is you have to go through even more to get time online. I ask myself, is it really worth it, or shall I go to another ISP!!!
As noted on the Service Status page, plusnet are aware that their dialup platform is not up to scratch, and they say they are working to fix this. Though whether these upgrades will fix it for good, I can't tell.