I guess I'm the exception to the rule here. I run the 3500 street bandit, and have no complaints. I might be a bit faster with a higher end converter, but my car is within 2-thousandths every run, so its consistant. Mine is behind a 452" B motor that pushes my nearly 3800 lb Satellite to 12.40 @ 110. Online calculators tell me I'm getting about 8% slippage, which I figure is acceptable for a budget converter. It stays nice and cool, as my tranny consistantly runs at a few degrees below my motor on the street. Lastly, when my motor was out, I sent the converter back to ACC to have the stall speed adjusted from 3k to 35, they had it back to me in 2-weeks, and charged me $40.
Is it the best converter available? No... But I was on a budget, and at less than half the cost of some others, its doing the job for me right now. Maybe someday I'll step up to a high end converter, and I suppose only then will I really know how good or bad this one is.
If you already have it, I'd give it a try. Measure the slippage, and see how consistant it is, then make a decision.