I bought a kit a while ago after I'd already made my own diy hoseless pole from the instructions floating about and to be honest I went back to the diy kit!
Save your money go b&q,screwfix etc and buy a 22mm pushfit fitting for central hearing plastic piping,put the male rectus and hose through and secure it in the centre of the 22mm push fit, I actually used a piece of Gardiner minibore hose glued it all together and it fits snug in the centre of the pushfit then wrap the outside of the push fit in elec tape and fit inside the pole.
On the hose side I just used the black plastic barb fitting that comes on the Gardiner pole hose and it fits snug into the reel hose and jubilee clamp to secure it, at the female rectus end make sure you use the clamps that you use pliers to close not jubilee clips as they just catch the inside of the pole with the bit that you screw to tighten!
I like mine in the fact that there's no messy hose hanging up and when u unplug and reel in it unkinks he hose every time, wouldn't say there's any time saving but just prefer it myself!
I did the same prior to buying the kit for about 18 months.
The only difference with the kit is the ejector sleeve that protects the rectus female fitting on the reel/pole hose. Can be bought seperately , pricey for what it is - a bit of plastic, but guess its the tooling costs etc. of bringing something like this out.
I still haven't read any real cons to it tbh only people seeing no need for it and as such labelling it a waste of money.
I really like my set up and find it very useful but thats just me.
Shrek my advice would be only buy it if you think the advantages it provides are worth it to you.
The advantages to me
1 pole in van, sections added and removed easily as needed
easy repair / maintenance / cleaning of pole sections
tidy van / no tangled mess of pole hose
no dripping pole hose
longevity of connections greatly increased
easy to clean pole hose with a cloth each time its wound onto reel and prevents it getting twisted between jobs.