Yep, hose can get blocked and silts up, narrow nozzle for narrow gaps, no won't pick up a tile unless it's fairly small or a pair of tilers pliers that i found once

Stupidly expensive for what it is but does have some good points. No ladders to fall off, no ladders to move, clean hands, reaches some very difficult areas.
You get to feel superior too

Just like a waterfed pole user.