We have installed Haltech on a bunch of cars, from a Supercup
we made into a twin turbo, to RX7 turbos, Supra Turbos, some Mitsus, and a bunch of other Porsche turbos (n/a also).
We have also installed Electromotives from way back, from the Tec1 up and including the Tec3.
We now have chosen to stick with Haltech
.. the Tec have some weird quirks that we arent to impressed with. Not being able to grab a file from the ECU is just one.
On my personal car I installed a Link ECU
its a good system, not well known here, but the sytem works fine, and the software is easy to use.