How about the Megasquirt 2 ive been reading up on it and seams to be easier to use then the QH
Haven't used Megasquirt, but I doubt it's any easier than QH. Explanation to follow:
I am proficient with the QH and I think it's easy. The one thing that seems to confuse people the most is just figuring out how the EEC thinks so you know what to change. But I think you have to figure that out with any method of self-tuning. The Megasquirt may have a simpler internal logic than a stock EEC (or at least the option to set it up that way), but that may mean reduced drivability. If it's a race car, who cares? If stock, then the QH seems to be better. It gives you all the capability of the stock EEC (and you can in fact revert tune to stock anytime), fully customizable.
The only other area that I see as a hangup is that you need a definition file for each EEC processor strategy. If you have an oddball car, that's a problem. If you have a Mustang with an A9L, no problem at all. Even so, there is a choice - freebie or paid version. I have heard the paid version is better fleshed out (more parameters editable), and clearer.
The Quarterhorse datalogging is great and VERY helpful for any kind of drivability problem. Even not tune related.
Since there are some technical questions you are sure to have, I recommend asking about support before you buy the QH from any given vendor. You can actually give pretty good support by emailing datalogs, if you are dedicated.
You also don't absolutely need a wideband O2 for self-tuning, though it's nice to have. This becomes more necessary when you have an MAF with an unknown transfer curve (or combination of MAF and intake that is untested).
A lot of the stuff that seems to trip people up with the QH (how do I handle load, what injector values do I use, etc.) is actually just as hard with other methods! They just seem to have better written help files.
Oh, by the way ... You also need a software program called Binary Editor. This works great, but support can be a little dodgy. If you buy it, ask questions upfront. I strongly recommend buying the dongle so you can reinstall the program if anything happens to your computer.
Oh, one other thing - if you don't have a Windows laptop, figure in the cost of a simple used one to the total cost of going this route.
I like the QH for sure! Best $400 I ever spent on a modification.