Yep, I got the reverse indiglo gauges from Speedhut for my celica last year.
I found them very good to deal with - they only had mph versions for the US spec cars on their site, so I emailed them asking if they could do a kmph version with a higher redline - it wasn't a problem, I just had to send a digital pic of my original gauges to them along with my order - which arrived 8 days later.
The gauges are actually thin overlays which you slip over your needles and stick over your original gauges with double sided tape. This sounds a bit cheap, but once you've put the bezel and plastic cover back on they look great.
Electrically they are simple to attach - you just need to connect a cable to an earth, and the other one to your headlight power cable (which you find with one of those testing probes) - or if you're lazy like me, you can run the cables to the cigarette lighter light and solder them there (since if comes on when you turn on your headlights/dash lights).
The gauges come with a dimmer adjustment and a switch which lets you change from blue to green (on the reverse indiglos).
The speedo doesn't need recalibrating since speedhut base their overlays on your original gauges, and you don't need to remove your needles to install them.
There's only two minor probs that I've come across: They do make a very quiet high pitched noise when running - which most of the time you don't even hear. Second - when you first install them they can cause your needles to stick - so the best thing to do is install them - leave your dash apart and go for a drive to see if they stick. If they do, you just have to press the overlays down firmer and/or give the needles a little jiggle.
Once installed (it only took me an afternoon) they look great and at night look even better - they can be a little dangerous though, since for the first week or so you find yourself looking at them more than the road
Hope this helps