Great little engine. It feels very nicely made.
Simple, all metal design. It came with a spare o-ring for the boiler lid and a spare wick (60mm long).
Filling the base with denatured alcohol and the boiler with demineralised water, this thing will take about a minute or two to heat, and then crank along for up to around four minutes once started.
I gave the flywheel a bit of silicone spray and this thing is super smooth now.
The first time I ran it there was probably too much wick sticking out (maybe 7.5mm). The flame was too large and the engine overheated.
I've since shortened wick which allows it to operate for longer.
One thing to be conscious of is over filling the boiler. If I do this, water seems to spray out, and can drip on the lamp.
Several times I've had enough water on top of the lamp-base that it touches the wick and starts to draw the alcohol out.
If this happens, the flame can become too large and the cause issues (including being a potential fire hazard, but that's true of any flame and the nature of these types of models).
It's a great engine and I can highly recommend this!