I believe you mean the Mk1? The Mk3 is a fixed blade.

Since price is an object for me I do not own a Sebenza yet (drool, drool) . Maybe after my Randall 25 gets here (just 2 short years to go on that one.) Believe me, if I had the money I'd spring for the ETS Sebbie right now.

You can find reviews of the Sebenza at Bladeforums. There are a couple of threads discussing Sebenza vs. Griptilians, including RSK's here and here. There are plenty more if you do a search.

I have had the full-size Mk1 for awhile now and carry nothing else besides a small multi-tool. Knowing how mine has held up, I'll say you can't go wrong with any of the Ritter knives.