Most of the surplus stuff is designed as a "system" so in some cases people are unhappy with it because they buy part of a system and wonder why it doesn't work well.
I'm not keen on wandering about in cammo myself as I'm not a soldier, don't want to be one and don't want to pretend to be one. On the other hand when I thought about it no one sees me when I'm out and about so why should I care.
With waterproofing washed into them the windproof smocks make the ideal lowland/forestry stalking jacket. I've a lot of jackets but the windproof smocks go out almost all the time now. I also now use them a lot when fishing, walking and doing other stuff. They are not totally waterproof which makes them very breathable and so you actually stay drier and warmer than even in the best of the totally waterproof jackets. The pockets are great, they are hardwearing, you can pick them up for £10 and being part of a clothing system makes them very flexible. If it is going to be very wet then wear the smock with a goretex layer UNDER it. Then you keep your pockets but are totally waterproof and pretty silent, the fact that it is designed to be worn under the smock is why most of the surplus gore tex layers have no pockets.
I like the design of the older DPM smocks as they are much more simple but the latest MK2 MTP smocks have mesh lining, pit zips, fleece handwarmer pockets and so on and they compare very favourably with commercial jackets in terms of "features." The problem is that you don't need many of the features. As a cammo pattern I prefer MTP simply because it isn't so dark and so works better almost everywhere except for in deep forest however it does stand out a bit more in low light.
There are also good Haix and Altberg boots available, for around £50, as surplus. If they fit and suit your feet then these are top notch boots for very little money.
When it comes to trousers I would wear some of the surplus trousers in warm weather but still can't find anything to beat Harkila trousers in bad weather.