I have the blue Cox reel at the moment it's a joy to use but I'm reeling out 60 meters on most jobs so I'm getting the electric soon,I purchased the original one they do the petal style but it couldn't handle hot water it kept blowing the fittings off. How much time and effort is it saving you do you reckon.
I didnt really buy it to save time or work quicker it was to just make my working day that bit easier (so effort wise i generally think you will notice the difference at the end of the day, it is a joy to use).
Time wise well it can reel in 100mt in about 30-40 seconds with no effort so its really down to what jobs you do i guess, but if your reeling out 60mt per job its going to be quicker but imo not going to make that much of a difference really over a day.
Its not going to let you do an extra 2,3,4 houses a day because of its quickness but it certainly makes the day easier for sure effort wise.
The hd version is very well built and cant see any issues using it with hot water, i would recommend using 6mm hose tho and you will probably need a larger barb fitting then what is supplied with hot water to get a very tight fit (i changed to an 8mm barb with microbore also the screw thread is 1/4 inch so have only found an appropriate fitting on e-bay)