SB, mine haven't been scratched (as yet), but that's mainly cos I keep them away from my other half, one of whose many gifts is the ability to trash stuff without even trying.
I have two lots, one set of three and one set of two (which are the two smaller ones from the set of three) and the smaller two aren't heavy at all, but the biggest one of the three is heavy especially when full (I use it to store my fleecy throws).
They are much more sturdy than they may appear on TV (I don't find them noisy as the fittings are well made and don't clank too much) and I do think they are much bigger inside than you expect them to be - I use the smallest one for papers as it fits A4 and the middle sized one of the set of three (larger of the set of two) is used to store hand towels/ but I'd say it could fit probably 4-6 pairs of regular sized shoes in there. However, my other half has size 11 trotters and I've just tried and max 2 of those bad boys in that size trunk (plus a pair of flip flops)! If they bring out the set of three again, then I reckon the biggest one would easily fit 8 pairs of size 11s.
Hope this helps!