Well worth the money to monitor your Disco.
I prefer the Ultragauge Blue that is used with a smart phone and/or tablet/iPad.

Getting an ultragauage blue for XMas. Excited to have a Bluetooth tool instead of scangauge.

I have the standard one. My personal opinion is you’re nuts if you don’t get this or another solution to monitor temps.

I ran a phone application for a while- PITA. The permanent mount of the UG gives it to you just like a normal gauge- which is of course another option. The UG is basically plug and play, making it really easy. Plus it’s $60. What’s to lose?

I’m looking forward to the phone so I don’t just stare at the darn thing. I will like being able to monitor, but not 100% of the time.

also, watching fuel trims etc. will be fun for me. My scangauge doesn’t do that.

My UG just arrived yesterday. I’ll be using it in my search for a Disco as I will take it with me and plug it in to monitor temps and other things on test drives. It’ll be awesome to have in my Disco when I do buy one as well.