I have had one since April or May this year (has been used every day as main PV). It still WORKS fine, but it looks really battered. I did have periods where I thought it was dying off, but normally cleaning it thoroughly seemed to help (I've been spraying contact cleaner into the switch and working it which seemed to help on one occasion). I found the blue 18650 battery supplied with it is not great. Other 18650's seem to perform better (they need to be extended with magnets). The 18350's work fine.
The finish as you can see is not very good. This hasn't been dropped or carried in a pocket with coins, this is just from general (heavy) use. This was a titanium one. Originally the
three parts matched but now they are all a different colour. Where the horizontal strips of coating or whatever it is comes off, underneath is a dull grey colour (primer possibly?). But it works, came with a load of bits and pieces and adaptors and for that reason I can't complain too much considering the price paid.