why do some dislike clutches?

[mk351e]

I'm thinking of putting a tekno clutch on my muggy (when it finally gets here), but I notice that lots of guys don't seem to like the clutch setup. Why? I'm coming straight from nitro, so if it's because of the delay, then I guess it wouldn't really matter to me, as I'm VERY used to it! However, I might be thrown off by the lack of (lots) of engine noise.

Soo, is it just the slight delay in takeoff, or something else? Not including the initial cost or replacement parts.