I shot the mags up till last year. I loved these BHs. They flew very well from a tuned bow, and were very tough. The steel ferrel (not aluminum) and the construction is solid with thick blades that are sharp enough.
I found the mag to be a tad noisy in flight, but nothing I worried about.
I had nothing but great blood trails from the animals that I was lucky enough to stick arrows through.
Do a search on Archerytalk on them, you will have a weeks worth of reading to do.
I only switched from them last year to have my first go round with mechanicals. If I go back to fixed blades, It will be the Slick Trick Mag again.