so far works very well. no build up and no rust on brush thus far. by comparison - better than other brushes purchased which became rusted very quickly
It's a toilet brush, it works very well, my toilet is easy to clean with this, but it's not anything special.
Flexibility allows for the brush to go right down into the drain to get stains out of there, works well. Could be better if it had that little mini brush facing up, to clean under the rim. Otherwise though, best of the brushes I've bought in the past. Used a few times, so far no build-up in the storage part or on the bristles.