My experience with Tricomin (and I use the shampoo and the spray) is that:
1) it seems to decrease shedding
2) it helps make your scalp feel healthier
3) appearance wise, it helps my hair look thicker
Other than that, it hasn't done much for me. I used it alone for two months, then on and off while using Minoxidil, and now I'm back on it alone (I've experienced some bad, but pretty rare, side effects from Minoxidil).
In my opinion, Tricomin's worth a shot but I wouldn't expect anything miraculous as far as regrowth goes. With that said, everyone reacts differently to different treatments, so you never know. It's also pretty expensive, so it's up to you whether or not you think it's worth it. Minoxidil, as far as proven results and price goes, is probably the better bet.
Good luck!