It depends really on just what you want from it. Over the years ours has had problems with the hydraulics, an O ring and various odds and ends that I can't remember. Mr F has replaced as many of the bits and bobs as possible with British bits, because you can get hold of them quickly and cheaply, and they are better quality than the Chinese originals.
We retro fitted a fork lift and bucket on the front, and Mr F managed to turn it over
by having it high, with stuff in it, then a front wheel hit a pot hole. Managed to pull it upright with the David Brown. The weight the fork lift can cope with is a bit restricted, so you wouldn't fill it with rocks, but it copes well with muck and so on.
There is a definite limit to what it can cope with, certainly not a baler, as it just doesn't have enough power, but for rotavating, rolling, raking, topping, carrying hefty weights in a back box, ploughing with a single furrow plough and towing a small trailer it's great.
Sizewise, I'm 5'4" and find it a perfect size. I can use the David Brown, but I have to sit a bit sideways to depress the pedals fully - the Siromer is definitely small lady sized.
For a low cost tractor I have only praise for it.
Where's the tractor icon when I need it