If quality makes a difference for you, this is your product. I own both the TEC P-7 and the Chinese clone. I got the P-7 from a $50 mystery box from TEC’s website. I also ordered 14 Chinese clones (marked with a X) for roughly the price of 1 TEC P-7, though it took a month to get to me in the USA as opposed to 3 days from TEC.
Ive used them for EDCing Swiss Army Knives for the past couple months and the TEC P-7 is worth the money. I’m sure if you not active and work in a office the cheap option might be for you, but for me I’m quite active. I’ve already gone through 1 of 14. The one pictured is #2. The metal on the clones are quite malleable, and I’ve already had a couch eat a SAK for a couple days because the clip didn’t maintain. The P-7 on the other hand is solid. It maintained it shape even through a thick pair of corduroy pants that warped the clone. #2 is pretty bent, it’ll probably have to be replaced by the end of the summer.
As far as difficulty of assembly, I can put them together free handed without too much trouble, but my Mystery box came with a tool which makes it simple. I believe it can be acquired from TEC.