The long pointed, locking blade could be a legal problem in the UK (but there is already a sticky thread that fully details all that).
While I admire the sharpness, ease of sharpening and value of the cheaper wooden handle Opinels, I am not a fan. My brother had one. It was too easy to to cut yourself with the darn thing, especially when locking & unlocking the simple yet rather hokey, sticky ring lock. Also the blade would rust a little too easily - a problem for all/most/many nice carbon steel blades I suppose? I didn't like the the look or feel of the wooden handle either (clear polyurethane finish?), an oiled finish might look and feel better. Also, without a guard, there was was always the fear that the knife might fall into/through your clasped hand, slicing through with that super-sharp blade. Owch.
Serrated edges on knifes don't look good to me but I have several different knives with a similar feature and it is quite a practical feature for bushcraft/survival, where you may need to improvise a saw. Also handy for cutting thick rope fast (climbing/diving) - it doesn't depend so much on the blade being sharp. I have two Chinese knives like that, one is very small, which I in my rucksack/on my harness when climbing, after reading Touching the Void by Sheffield mountaineer Joe Simpson. They are sharp, stainless steel but at $2 (yes $ not £) with all plastic handles, I could afford to lose them).
