looks great, but really for a special purpose...
Previous posters all have great advice. I have carried one for years, for all the obvious reasons, and have used it maybe 3 times. If you are often 25' or 50' away from the water spigot, then it might be a good thing for you. I am often 5' or 10' away and shorter lengths of regular hose are easier to handle. So, I have a 5', a 10' and a 25'...and the flat 50' in my hose bin and mix and match to suit the occasion.
2013 Starcraft 266RKS
1999 Ford E350 V10 Chateau (6.8L, 4.11 LS)
2005 Cedar Creek 31LBHS
2001 Sprinter 303BHS
1997 Mallard 33Z
1990 Starcraft Starmaster