As a clean boost (as I don't really like overdrive).
I use a Klon/klone more as a toneshaper/EQ/boost than as much of a drive (although, as you've noted, it's certainly more than capable). I run it last in my chain. I do think they're best hittin' an amp just on the edge of break-up. They work alright in other applications, just not as well.
A lot of people like gained-up klones as overdrives (placed much earlier in the chain than I prefer) though.