Chris
I have had mine fitted for a week now and so far so good
All the gauges are working which is a nice change
I got mine from ebay but you can get them from Maplins for less than a pound (ask for 10v Voltage Regulator) if you can be bothered to spend a couple of minutes soldering three wires on. I am too lazy so paid the ?7 on ebay. There are some on ebay where the person has soldered the solid state regulator into an old stabiliser casing so it looks original, you could do that if you have the time.
The main benefit for me was you do have to worry about screwing it to the rear of the dash like you do the old ones.
I would recommend them to anyone
Jason