Finally took the plunge last week (Tuesday) and upgraded from PAYG 1mb with 1gb cap (14.99) to PLUS up to 2MB and no caps. Was upgraded 2 days later, and now regulalry getting 1.6. to 1.8mb for downloads.
I'd also like to say thanks to Plusnet as I've just upgraded too. I was pretty upset with Plusnet after the problems that arose about a month ago and the continuous changing of plans with no info, but the whole thing has been painless, the speeds are great and it's cheaper than ever! I really can't complain - Plusnet have redeemed themselves.