Fairphone 2 wasn’t perfect when it was first sold in January 2016, but since then Fairphone has improved the manufacturing processes and I think that FP2 is more mature now. When a FP3 comes out (be aware that 2018 ends on the 31st December 
), it might have teething problems like FP2 had them in the beginning.
And although Google/Qualcomm won’t allow for a Google version of Android 7 on the FP2, the community will ensure updates in the long-term (and @z3ntu is in fact already working on Lineage OS based on Android Nougat).