So mine's arrived today. I ordered it from a trustworthy store in Hong Kong as it worked out costing around £70 less than if I were to buy it in the UK and it arrived in less than a week.
I've only test shot a couple mags, so I can't comment in the longevity of it but overall first impressions are very good and it kicks very hard as you would expect from GHK.
The Cerakote finish on the aluminium slide is lovely, and it does feel steel-like to the touch. The polymer frame looks and feels great too.
I hated the trigger and on the Gen 3, thankfully the trigger does feel better on the Gen 5 and quite true to the real steel (but still a little mushy). It would be great as a training pistol though.
The hop requires the use of an alan key and seems to be slightly easier than the Gen 3's but it's still a pain in the arse (although I haven't adjusted it yet).
Another gripe is the pistol feels very light, so make sure you mount a torch and a sight to fatten it up a little.
The pistol comes with 4 metal optic mounts, meaning pretty much every micro red dot should be able to fit.
You also get a speed loader and a Glock patch. Winner!
I will probably get a steel slide in the future but I'm very happy with my purchase at the moment. ☺️