I've had a few sets, mostly in bits, sitting in the hobby shed for too long to remember. I'd picked up a few small boxes from Poundstretcher when the Airfix Robogear line went down the pan. My recent games of Urban War, however, have prompted me to properly sit down an try to put some useful terrain sections together, ready to be quickly put on the table.
The main piece I wanted was a multi level tower structure a table centrepiece.
Next on the construction menu were some platform\outpost pieces (along with a couple of bridge sections). This gives more elevation and routes round the table. The can either be used stand alone...
...or connected together.
And with the remaining odds'n'sods I managed to put together some ground cover.
The upside of these kits is that they are pretty versatile, even if some of the shape combinations make my head hurt. Also my fingers hurt from trying to push in click-in joints, mostly from the edges of the clips. They are very metallic grey. I've seen some painted, even with just a wash, to good effect, but I am still undecided as to whether I want to mark some degree of permanence to my constructions with paint, or if I can even be bothered to be honest. I suspect it'll depend on whether I get fed up with the look.