Teng are mostly great but they are very expensive imo.
My favourite thing about them is each small set comes in a little box, and the lids are removable, and the boxes lock together so they are super neat in the toolbox.
Most of it seems really nice (my dad has a few of the sets) but they really are expensive.
The matte finish on the ratchets, screwdrivers, spanners etc is nice as they're grippier in greasy/oily hands than chrome.
The ratchet spanners though are identical to the cheap crap ones and they're about £60 a set - they're identical to the £10 set I retired for being absolute rubbish.