From the moment that I purchased this phone, I have not felt any regrets for doing so:
There are a lot of ROMs for the harpia (Moto G4 Play) in XDA, there is a decent amount of internal storage available for plenty of apps (16GB), the processor (Snapdragon 410, Quad Core, 1.2GHz) has never disappointed me with slowness, there is 2GB of RAM which is more than enough for multitasking, there is a 3.5mm headphone jack ( ͡° ͜ʖ ͡°) and LTE support, which contributes to very fast cellular speeds. There is as well VoLTE, which I have never had the opportunity to try out, since my carrier does not support it yet.
The only things, that I would have loved to be featured in the device, are the fingerprint sensor, a camera which worked greater under darker conditions, NFC and .. the compass sensor?! (I don't know what was the deal with removing the compass sensor.. Seriosly, Lenovo, why would you do that?)
Overall, I am going to rate the phone with 4/5 stars and would recommend it to everybody who does not mind about the missing features I have mentioned above (I can perfectly live without them, they do not ruin my user-experience the slightest bit).