Eavestrough "blasters"

[dguy]

Similar to these things...



...but work with a normal garden hose instead of a pressure washer.  I've seen 'em at Home Depot.


Does anyone have anything good or bad to say about them?  I've been cleaning crud out of the gutters by hand so far, but there's one section I can't get to at the moment.  The aparent ease of one of these suckers on a wand tempts me, but not if all it's going to do is drive debris in to the downspout and choke it off.