I use Lekis and love them. I have never tried the flick lock black diamond, but I can work the Leki's twist mechanism pretty well.

My only issue has been snow. Seems that I twist the poles a lot in the snow and they come loose alot. Never happens on hard ground, but snow does me in every time.

One piece of advice. I have had my Leki's for at least 7 years. Buy what you want. Even if they are pricier, you will probably have them for a long time.

TV