Now Howard, that's not true, you've not tried them all
The most important thing I've found is the stock STI spring doesn't last too long. I've replaced them with Wolff extra power mag catch springs, no more mag drop.
LOL, might be true, I have spent the cost of a decent production rig on them though! Even with the extra power spring it is bang click F&$K! The closest I got was milling one down so that with the button on it the release was the same height as no button on a stock unit, then I ground the button down where it was just a small tab extending back and slightly up to cut down the reach for my thumb. I only dropped one mag in 150 rounds, but that is one more than I can accept.