OK got the number 8 today. Took it out of the envelop (no box) and looked it over. Not too inpressive at first glance. After playing with it a while I did start to get the hang of it though, The blade was razor sharp and it worked as advertised. I guess that's all you should expect for $12. It did have a good feel in my hand. I will have to use it for week or so to see if I really like it though
I would imagine that the first impression of the Opinel is underwhelming. The blade is thin, the joint and lock seem anemic (compared to say a buck 110) and the knife is so light for it's size, it doesn't feel substantial. Add to all this the insanely low price and it screams "joke knife".
Somebody on this forum nailed when they said the Opinel is more like a starter kit for DIY modifications.
My suggestion is to bang on it for a while till you start to trust the blade, joint and lock. If the lock gives you troubles, you can make it more secure by filing the top of the ring so the can be rotated more than 90 degrees.
If start to take to it functionally, you can then think about reshaping or refinishing the handle to taste. I like mine treated with Tung oil.