I think they are great. I programmed by own chip for them, but they aren't very difficult. I know Turbotweek makes a very good chip for them w/alky, I've tried one and it worked fine. The 60's or 65's, whatever the vendor wants to call them, are very linear like the 50's are....meaning they flow 2x when 2x duty cycle it added....unlike others that may only flow 1.5x when the DC is doubled.
As far as the 60/65s, I set the injector constant to 64.5, and took some fuel out of the AE pump shot (because pump shot does not factor in injector size) and slightly modded the MAF tables, idle is great and off idle is fine now after leaning out the AE pump shot.