we have some in DS's room. they really do change the whole look of a room & look great - we have a sort of jungle one with a big lion & then a tree branch with a toucan & a spider that's hanging from it.

it definitely hasn't done any damage to the paint underneath (we rent & i was quite paranoid about this). the only downside we've found is that the thinner parts of the sticker (like some of the thin branches) have lost their 'stick' and have come away from the wall. the more solid, bigger stickers (like the lion) have stayed on the wall really well (they've been up for about 18 months now).

we wiped the wall first but maybe didn't do it enough? i'm not sure. it does get pretty warm in DS's room during summer as it gets the afternoon sun & cold in winter as we don't have ducted/central heating so i'm not sure if that has contributed.

i have loved them though & haven't taken them down! i think if we get more then i would look at maybe getting some cheaper ones to see how they go.