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Any great reason NOT to get one? Barring price that is.
ps I live in a dry country and don't ride during the short wet periods so mud not an issue.
I have a 125 Lev and love it.
My only cautions would be to make sure that you have enough seatpost sticking out of the bike to fit it. And are you srer that you want 150? If you're tall, it may be the best options for you. If you don't need 150, a shorter version will be lighter and will be less stressed at full extension.
I'm a gangly 6' 01" and trails here require full downing of the saddle for the downs. I have 8.5" from collar to rails. Dunno if that's sufficient?
8.5" collar to rails should be enough for the 150, but only by about 1/4" assuming same clamp and fixed collar as the 125.
My 125mm drop KS Lev measures 185mm (7.3") from the bottom of the collar to the saddle rails.
If I was over 6 ft, I'd probably lean toward the 150...