Sorry, I think "throttled to death" is a very reasonable description. My line is hardly stellar at 3 meg, but to expect no more than 512Kbps during most of the waking day on binary usenet and external FTP fits the description for the so-called 'unlimited' product. For usenet this drops to 128kbps at the time most people could be expected to use the internet for personal use. "value" is even more of a joke, with some caps barely better than dial up.
I'm certainly not a heavy user (2-4Gb typically in a month), but when I have the need to FTP or use a download site, I don't realy feel like getting my diary out to make an appointment, I just want it to work at a reasonable rate, now. For this reason I've stuck with PAYG which suits me fine and has no capped speeds other than those of network use.
I've taken the 3 quid off in exchange for a 12 month contract, but would not even consider 18 months, from PN or anyone else. Were I looking for a provider now, the products offered wouldn't even be under consideration with such vicious caps, and I decided against a switch to BBYW previously for similar reasons.
Line speed is available overnight for many of the traffic-managed 'download' protocols - this doesn't differ too much in this regard from BBYW. For most, the experience for average use should be great.
I think this is a wildly optimistic assessment, and I think Plusnet must be hoodwinking themselves internally if they think otherwise. While more knowledgable users know about throttling and what they consider acceptable, the average user (at who the seem to be aimed) doesn't. All they know is "my connection is slow - why?", and I think this will be reflected in the problems raised with support by those who want to download during the 'normal' part of the day. They will only see that the supposedly "unlimited" service you provide is very, very slow, and will doubtless pass this on on to others. Part of the reason Tiscali ended up with their unenviable reputation was their inability to offer the speeds trumpeted in their ads.
Like many others I've been here a long time, 8 years in total, 4 on ADSL. For those who know PN, their are too many deal breakers for most of us to even consider the current offerings. For the mass market users, you may well get them to sign up, but your reputation will suffer badly when they realise how they've been had on speed.
As wheel nut says, wake up!