I got my Mitch Hitch fitted last week..... a great bit of kit and don't regret buying it for a second!!! It gives me so much more ground clearance compared to the stock D4 hitch and would be many times stronger than the stock hitch due to the 3 BIG Bolts holding it on. 
For me, I pretty much had to get the Mitch Hitch as we have an Offroad Camper Trailer and want to use it as such (ours is no Caravan Park queen LOL). Therefore the "plough" had to go. Also, the front end of our Camper Trailer was way too low and not level enough with the stock hitch, even with the Towball Receiver swapped around the other way. 
Everyone will try to justify their own decision on whether they did or didn't buy a Mitch Hitch, just do what you think best for YOU and your family. Bear in mind..... the White Bushing that goes through the Recovery Point (see 1st pic below) in the Disco is supposed to be a one time use item!!! 
In regards to the rear parking sensors, it's a bit weird..... we had temporarily fitted the Mitch Hitch to our 2015 D4, but I had to go out for an appointment, so drove off with it tight, but not permanently "fitted", while I was out and put the car in reverse it sensed the Mitch Hitch was "in the way"...... but once I had gone back to the mechanics and completed the final fitting to the Mitch Hitch, the rear sensors didn't go off anymore? I haven't yet tried, but I'm sure that when I put the Towball Receiver in, the rear sensors would go off...... to fix it I bought a couple of 19mm rubber grommets from Clark Rubber to stick to the inner two rear sensors.
 

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