I have one of these Draper 35574 similar to the PR4 shown on the VWP page and it is bluddy brilliant for insulated terminals, the only one I have had (currently got 4 I think, the others are all B5T versions) which does the insulated terminals properly. Haven't actually tried it yet on uninsulated terminals as I rarely use them and I've not had it very long. Does a perfect crimp, and holds the terminal securely in the crimper while you pop the wire in the end, so if you are doing one in an awkward place there is none of the swearing associated with B5T versions where you are trying to hold the wire with one hand, the crimper with the other and the terminal with the hand you haven't got...
Edited to say it doesn't appear to be suitable for uninsulated terminals though...