I’ve had my oneplus 3 for nearly a year now. It’s brilliant. Given the 3t is pretty much the same with a few tweaks, I’d highly recommend going for that. But then it’s all relative and it’s a 400 quid phone. Much cheaper than the Samsung’s and the like, and imo a nicer phone.
With big storage I have absolutely no need for expandable storage which I generally always used to insist on. The nice thing about just internal memory is that it’s super speedy memory, and means everything works very well and quickly with no lag.
Build quality is excellent, and even after a year it genuinely feels as good as new – the buttons are still very tactile, there are no creaks etc…
Best phone I’ve ever had.