This is going to be funny, considering Scotty has chimed in with his opinion already, but the Crosstrek 2.5 is about as Scotty-Kilmer-Approved as a new car is going to get.  Here's why:

1. Simple, naturally aspirated engine.  Cheap and easy for you to work on in your driveway with common hand tools (except for changing the spark plugs).
2. Even though the FB25D is new for the Crosstrek, it has had a few years in other applications (Forester, Outback) without any major trouble.  The underlying FB25-series motor is bombproof and has none of the head gasket problems of the older EJ engines.
3. AWD systems add additional complexity, but Subaru has theirs pretty well sorted.  I've never known anyone to experience a failure with late model Subarus.*
4. The Subaru CVTs also seem to have most of the bugs worked out.  I wouldn't tow with it and I would change the fluid when it goes off warranty, but otherwise it's pretty good for a CVT.
5. In general, the Crosstrek platform is about as reliable as they come.  

That's not to say it's a perfect car.  It's an inexpensive car and looks like it.  Unrefined.  Kind of noisy.  Lots of black plastic in the interior.  Not many comfort features.  And even though the FB25 has a little more power than the base FB20, it's still pretty slow.

*FYI: in my family we have 5 Subarus (1 Forester, 2 Crosstreks, a WRX and an STI).  As I have said before, that's not because of any particular affection for Subaru, just how it worked out.  But now having lived with them up close, I have to say that the cool thing about Subaru is that they know what they are and they're honest about it.  Subarus aren't great cars, but they are great for what they are meant to be.

Yes they are decent cars, the main thing to point out is that the CVT transmissions are on the weak side. Other than that, they should be farely reliable, assuming they don't get recalled which has become a trend with Subaru in the last decade. If its a manual transmission + simple naturally aspirated engine combo, that would be an almost bulletproof combo, assuming the small bugs and kinks are worked out.

My wife bought a brand new 2016 outback from the dealership. We trusted their reputation for being reliable, and just to be safe we got an extended warranty. Transmission went out at 70,000 miles and it got rebuilt under warranty twice and it still never really drove right. Car was amazing other than that cvt. I’m never buying a new car again 

Only time will tell on that one I personally never buy anything new wait at least four or five years to see if they hold up but that from the past they're decent and they're still making them okay realize Toyota I think owns 20% of them now

If Subaru would just specify regular fluid changes instead of insisting the CVT is a "sealed unit" they would probably be a lot more reliable. From what I've seen the dealers in the U.S. don't want to change fluid until at least 100K miles, if ever. That's just begging for trouble. (There are youtube videos showing how to DIY but it's a pretty involved process.)