My wife's August 2015 (late July 2015 factory build to order) Polo 1.2TSI SEL has that engine (obviously) and is now at just over 34,000 miles with no issues, it typically returns 48>54MPG over a full tank, and easily achieves 60MPG on longer runs.
Two small issues, that car was delivered new with a hard plastic preformed ribbed EVAP pipe, that caused an annoying "peep peep peeeeeeeeeep etc" while the EVAP solenoid was allowing the system to be purged - no need for that so I demanded that VW sorted that out like they were meant to have done by time that engine had been manufactured - and they replaced that hose for a smooth bored thick rubber pipe. Second issue was too much clunking from the power train due to, as it turned out a failing gearbox top compliant mounting, after removing it and greasing it up (?!!!) VW said it was sorted, and so it was for a month or two, eventually I requested that VW stop messing about and replace or fix that mounting, they replaced the probably softer petrol engined version for the TDI version and that sorted that out, Skoda used a different version with this engine in the Fabia, ie Skoda use 3 versions, NA petrol engine type, TSI engine type and TDI type - why VW and maybe SEAT don't - who knows. By that time, still under warranty, one of the front lower wishbone rear (vertical) bonded mountings had torn but that would have been due to driving through an unsighted pothole I'd think more than a VW Group design issue. If they end up tearing again in the future I'm considering replacing them with the non voided versions from cars like the Golf R etc, I replaced the previous design of mounting at that point on a 2002 Polo 1.4 16V SE with the SEAT Cupra
Ibiza solid version and that lasted for over 10+ years without imparting any new nasty noises or vibrations into the cabin.
Oh, one other thing, on that August 2015 VW Polo 1.2TSI SEL, I discovered that the petrol feed pipe from the in-tank LP pump up to the engine mounted HP fuel pipe, was free to move and was rubbing on one of the AC pipes - which is not good, as the car was outside warranty, and again VW claim to have resolved that before that car was built, I just bought an almost suitable "bridging piece" for a Golf which is just a plastic bracket or 2 that clip onto pipes with a swivelling part between the 2 clips, that type of clip is intended to be used in situations where either a pipe needs steadying or spaced from another pipe, as one of the clips was slightly too big in diameter I applied fabric tape to the point in the fuel pipe that I was going to fit it over - and for the past couple of years that has worked okay - ie no more rubbing through the rubber fuel pipe.
Hopefully not an issue for your engine, but just in case it does happen, quite a few, especially Skoda Fabias mainly, have suffered from one of the HP fuel rail snapping off and allowing HP petrol to spray out over the front of the engine, now I don't consider this to be just a slight inconvenience, more a potential fire hazard, but unfortunately VW Group have not been seeing these cases as most cars are getting recovered to the nearest garage, and a new set of bolts and sealss fitted at the owner's cost! It turns out that the Skoda factory that builds these engines - all these engines for all VW Group cars, had an issue with under torquing or not torquing up these bolts correctly over a period in time, that was corrected but no action was taken over the cars that went out possibly with this issue, very good - not VW Group. This issue seems to take quite a long time to appear and has been appearing randomly wrt age and mileage - I'm just alerting you to this issue just in case your car ends up snapping a HP fuel rail bolt and you will now know it is not an extremely rare occurrence - I've already bought new bolts and if I can move the inlet manifold out of the way enough, then I'll depressurise that HP fuel rail and replace the bolts one at a time.
Edit:- I've missed out four words from the last paragraph, it should read "have suffered from one
of the 3 bolts of the HP fuel rail".