Have them on all four corners of my 5 - never had a problem. As long as they are all well matched in terms of tread etc and aligned then ‘losing it’ in the wet my be down to driving style and the nature of rear wheel drive as much as tyre choice.
Having said that, confidence is a big factor and if you have lost confidence in these tyres you are likely to attribute every little problem to them and therefore probably won’t enjoy your driving experience until you change them. I would imagine that much of this is placebo effect and the scientist in my is already trying to work out ways of testing this (“geek!” I hear you shout! [;)])
Tyres seem to be a fairly subjective thing with the one guarantee being that people will disagree over choices. If you ever visit a photography forum and read the ubiquitous ‘Canon vs Nikon’ debates then you will see what I mean. Rather than saying "they are both pretty good, but I prefer this one, one becomes the choice of the true visionary artist, whilst the other is the choice of satan’s paparazzi! Reading through the tyre reviews online you get an equal number of ‘terrible in the wet but wears well’ and ‘great in the wet but went through them quickly’. Just goes to show that everyone has their own story. The one factor that does seem to keep popping up is that not too many people would buy again (excluding motorway drivers).
Lastly, if you are anywhere near Bracknell then Bracknell Tyres and Batteries will fit 4 Toyo’s for £170. Hope than helps…
Nick