Hi Mate, I own one so can comment:
The only gripe I have is with Vauxhall, there spare parts are a herrendous price:
As to the car it`s self,, it really pulls well considering the wheight and length and is very good on Mileage..
Round town about 27 mpg::: on a run a decent 35 mpg, if you boot it,,, it lets you know you are back down to 23/25..
I am talking 80 mph +,, so all in all very good that way.
Regarding working on it does have a few things like changeing oil filter, bit of a pig to get at, and not lose the oil while while doing it... If anyone on here can tell me different PLEASE tell me..
very comfortable ride, and is amazeing in 4 wheel drive on snow.
Our road is never gritted so it becomes very hairy at times..
As regards the car, I am well pleased with it, I groan on here about prices they charge but there are other alternatives to try.. As long as its not over heating mate get one, welly it when you buy it and take it for a Good run.
Then its make your mind up time.. yes the engine is as you say the same as the JEEP, but keep things tidy and well topped up with oil and water, and they should go ok..
Hope its been a little help..
Colin:Norfolk.