The OS is still alright but then Meizu do not have updates to their older model that leave consumer with no upgrades and push Meizu Fans to switch to other Brand
Meizu devices looks good on specs but wait till u have it, it will be a headache. Dont trust me? Look at their bug reports on official page. Its good on the paper but flyme os will ruin everything, its fine if u can flash other custom rom but its almost impossible to flash custom rom so goodluck
Garbage os plus good hardware is still garbage. Flyme is garbage trust me. My last device from them is mx4 which was released on 2014. Poor implemetations of features in software side, its fine but its almost umpossible yo flash custom rom to flash, monthly updates of useless fixes, their trend continues upto this year just look at their bug reports on their official page you'll see.
Last but not the least. If you think that only browser, social apps, camera is what u need, think again youll meet plenty of headqches that android o.s is not as simple as u think
Oh, so let's hope that like vivo, Meizu will incorporate the under-display fingerprint tech, Plus the dual curved screen (the more competition the better).