If you already have a LR then the shared cost is better. And honestly it doesn't take long to recoup the DIY costs. I have no faith in the Chinese mangoose as far as support for anything unexpected. You're paying for that demonstrated support from the folks at GAP. But it's just my experience and opinion.
You can't be serious comparing a ÂŁ50 Mangoose piece of clone junk to a IID, where the Pro version is ÂŁ1700... even comparing a Mangoose to the IID-BT for ÂŁ400 is a hell of a stretch... If you want a genuine and JLR approved device you have to pay for it. Although the cheapest JLR approved diagnostic interface is actually ÂŁ180, plus the software, which is technically free to download and you can buy a subscription for a single model and model year, for ÂŁ111 per year.
Let me follow up with an example - in the model years after 2007, Land Rover enabled a couple of nice extras like clock in the dash and three flash indicators for one one action on the indicator switch. This was done through an update of the firmware of a couple of the ECUs. One of these was the IPC or essentially the dash display module which also handled some security (key) functions. You may see where this is headed...
I can do all that stuff with SDD and my VCM, or my genuine Drewtech MongoosePro JLR-A. And a shitload more, actually I can do way more than even JLR dealerships can...
There were a number of folks who dragged out their Mangoose cables and knock off SDD cracks and attempted to reflash with either the correct software or what they thought was the correct software
Honestly anyone who works on a ÂŁ50,000 car with a ÂŁ50 knock-off diagnostic tool and hacked software has it coming to them. It will happen sooner or later.
The GAP tool folks worked out a "just plug it in and it works" firmware which ironically could also rescue those who had been Mangoosed. My LR is a 2007 so I wanted the upgrade features but had no desire for buttock clenching and holding my breath. The IID tool did the deed in about five minutes - no mess no fuss but I had confidence that someone was available at the end of an email or phone to talk me down from the ledge if necessary. As with many products, that's what you pay for.
Cool. But again, you're comparing a ÂŁ50 counterfeit product with pirated software against an actual engineered product that costs quite a multiple of the price of the counterfeit.
I don't think there's anything wrong with the mongoose pro in the right hands. It certainly sounds like its much more advanced and you can do much more with it. But it comes with the added problem that you can turn your car into a large paper weight.
Genuine approved interface with a properly installed, activated and updated SDD, nothing to worry about unless you're trying to work on very old Jags (say, pre-2003). Though by the time you've set yourself up with a decent working kit you'll have spent the better part of ÂŁ800 or more for the device, a decent laptop, a big power supply, etc. Actually if you are only interested in 2006-onward JLR vehicles then you get a DA-Dongle, which is also JLR approved and less than half the price of a genuine Mongoose Pro...
On the other hand, there's a ÂŁ50 junk Mangoose from eBay or some Chinese webshop with a dodgy hack patch from some thief to make it sort of work (sort of), then installed on the oldest cheapest crappiest laptop people can find, with no power supply connected to the car so the battery runs flat half-way through trying to trying to do things they don't understand... that's how you end up with a 5000lb paperweight sitting in the driveway...
I'll admit, SDD is a very unfriendly software for new users. And most vehicle owners just want something that works. Which is why if GAP comes out with a Jaguar IID they will probably sell a few, but I doubt they will ever turn a profit from them. There number of Jags out there are about 1/5th the number of Land Rovers. So for every five IID's they might sell for LR, they might sell one for Jag. Unless the owner happens to own both, then they only sell one unit, and two licenses.
Good luck to 'em.