Roughly 3000 miles on my '19 CX-5 Signature with the turbo engine. I came to it from a 2016 BMW turbodiesel. The Mazda drives better, with basically zero turbo lag and gobs of torque down low when you need it. Maybe there are circumstances when you could trick the engine into lagging a bit, but you'd have to try hard. Highway passing is very nice indeed.
I recently rented an XC40 for a week and have spent significant time in a brand new BMW turbodiesel, and both are shockingly laggy by comparison. If a little company like Mazda can tune their turbos so beautifully, why can't those bigger companies with their costlier cars? My Volvo rental even stalled in a stop-and-go situation. I can't recall the last time an automatic-transmission car stalled on me, but many modern cars give the impression the engine's been strangled to the point it barely idles so maybe that has something to do with it. The Mazda's engine conveys a sense of coiled readiness that I haven't really felt in a popularly-priced vehicle since the '60s. On the other hand, its fuel economy reflects its sportiness. (Still, my best: a 40-mile commute through mixed traffic, repeated over three days, netted 29.2/29.7/32.2 mpg.)
The Mazda's Signature interior is also generally nicer than the XC40 or BMW 3-series', with better seats than the Volvo-- and anyone familiar with Volvo would be shocked by that statement, as great seats were once a defining characteristic of that marque. The XC40's seats seemed right out of Chinese parent Geely's parts bin: hard, too-short and not correctly shaped.
The CX-5 and 3-Series both have superb driving dynamics, while the XC40 seemed ponderous and lazy by comparison.
Only the Mazda's infotainment system is weak by comparison to those two, and CarPlay and Android Auto largely moot any shortfalls. (The Volvo did not have either and refused to allow me to use my phone via a Bluetooth hearing aid adaptor when it was cabled to the console for charging.)
The Mazda's engine also sounds great. It has a V8-like burble at idle (thanks, perhaps, to its unusual exhaust-manifold porting) and it clears its throat quite satisfyingly when you lay into it. Which you'll want to, as it just begs to be beaten around the twisty bits.
Also deserving of praise: Mazda's transmission. Fast, imperceptible shifts, never any hunting around for the right gear. Some condemn it for only having six gears, but okay, so it's the anti-CVT: more isn't necessarily better. It is smoother and just as fast-shifting as a DCT, and there's never the sloppy what-next pause you get with a DCT when a change of more than one gear is needed.
What Mazda has accomplished is entirely impressive.