Having read other reviews of this product, I have to say that there seems to be an element of chance if you get a good one or not.
The tank feels quite robust and has taken a few knocks in its stride, the 'engine' noise can be a bit loud but there is a volume control to turn it down. The smoke generator is rather noisy, drowning the engine sounds unless you turn up the volume.
The speed is controlable from an absolute crawl to quite fast and the gun is commendably powerful.
On the down side, not long after I received the tank it developed a fault, one of the circuit boards inside failed but Howes were superb in sending a replacement and so far it's been fine.
Taking the tank apart was easy but you do then get to see the real chinese build quality. Least said about that the better!
Other reviewers mention the difficulty of filling the smoke generator, this is an issue as the pipes are hidden down the side of the models exhaust stacks and are clear plastic. I took the opportunity while it was apart to cut some of this pipe away and put a small bit of metal car brake pipe in its place. This now gives a nice 'spurt' of smoke as well as making it much easier to fill. The gearbox has nylon cogs and definitely benefitted from a liberal dose of silicone grease.
Can't say much more really, to be fair, even if you do get a duff one, if my experience is anything to go by, Howes will sort it out for you.