As an owner of multiple Mini's I was biased against the Clubman primarily because of it's size. However, I needed a nice wagon preferably with side opening doors to carry paddle boards, kayaks and ski's. Side opening doors allow you to get into the back while stuff is stowed on top. There are no side opening doors any more on smaller to mid-sized vehicles.
I got the base engine and find it perfectly competent for everyday driving. It accelerates very nicely in the low to mid range and drives quite well, especially compared to prior Mini's. It sits on a BMW X1 frame which gives you an idea of the size. It has plenty of room for rear seat passengers, cargo and a nice low roof to store things on.
The seats are comfortable and interior is really nice. I hate complex electronics but I actually like the Mini's and found it easy and logical to use.
I will also say this. They can get expensive really fast to where you are in BMW-Audi-Lexus range. So, pick options carefully and watch for sales or incentives. I bought mine as they were closing the 2016's out. I find they are a good value at the lower prices.
For me, low roof, side opening rear doors and good cargo/passenger space were the keys along with being on sale. I like the distinctive looks and BMW engineering, as well. I can recommend it to any family or single person who wants a smaller practical multitask vehicle for city and countryside.