Frnds I think every phone in this world have some good or bad qualities in them, thats why I can highlighted both the quality of this phone( Samsung Galaxy S8+ ).
Good- Gorgeous looks and excellent construction quality. Brilliant displays. Phenomenal camera quality. Class-leading performance.
Bad- No flat screen option. Nearly unusable fingerprint reader. Software stuffed with unnecessary features.
So frnds in my opinion u can buy this phone. I know this phone have some bad qualities, but every phone contains some bad qauality.