That's the easiest, cheapest, and most well-documented. People have been experimenting with the Pro EFI systems lately too. Toyota wiring's well-documented, so any ECU option could work.
There aren't any real limitations. The heads flow the same and the bottom ends are just as strong. People have been experimenting with stock compression (10:1) and E85 with great results. A few guys are over 500 I believe.
Overcharged for uncompleted work and idiocy. Ended up towing the car out of there and to another shop where we got it running. Always do your own work.