Well, it sounds like you have not used one of the current EFI offerings...So there are things to consider.

Self learning
Software update ability
Amount of wiring needed to hook up and install
Throttle body options vs. modifying your intake and adding rails to it....
Ease of programing
Expandability....Many are just a boxed offering and cannot be used but for one purpose, others are not.

I have used Classic FAST, and also their newer TB style as well as a Holley Sniper....

I really like the Holley over FAST for a few reasons....The software is awesome. It keeps the learn table separate from the base table, you can merge them if you want and clear the learn table, which I really like. Or leave it be and watch it build the whole table as it passes thru all the different cells.

And for it to learn, you only need the cursor to flash thru that cell, it does not need to sit there for 5 mins to determine the VE....

You can use a laptop with the Holley Sniper if you want, but most of the base operations are accessible thru the hand held..

I forgot how many wires were needed to hook it up, but it wasn't much, had it running in like an hour.

And the data logging with the Holley is very good, set a sensor reading to trip it, and go look at the logs...Just super easy.

The only thing that worries me about the Sniper is the ECU is built into the TB....The later/more expensive models they divorced it.....If your under hood heat is an issue.