Further research (particularly reviews): Some folks love 'em, some hate 'em. A common complaint is the connections are plastic and they tend to leak. Or the hose itself fails. Another problem is they apparently are not made for potable water, which seems odd since they advertise their use for RVs. Another problem is the recommendation to not leave them charged - my faucets are not real handy for either my deck or porch watering and I like to keep a fully charged hose with nozzle-wand hanging up for watering.
Sounds like the concept is good and well-received but perhaps the technology is not quite there yet. As one reviewer noted, might be best to wait until they have improved and are available in local stores (easier to return if they fail).
Looks like I will likely get new coil hoses, perhaps the smaller diameter ones, and put one of those metal coil protectors around the end by the nozzle (which is where mine tend to kink).
