Here's the deal, I had a Note 8 and an S8 plus before this phone. The S8 plus amoled display started showing burn ins within 3 months. The Note 8 was fine but nothing too special. I got tired and bored of Samsung and their lag as well. Yes, the Note 8 did lag for me and freeze here and there. It wasn't a MAJOR issue but it was an issue.
I was hesitant at first but then decided to leave Samsung behind and I couldn't be happier. The Find X is not only a beauty and innovative, it's a BEAST. Super fast and smooth. Been using since launch and I have not had it lag or stutter once yet. No forcecloses like Samsung. Plays PUBG like butter and doesn't hiccup like my S8 plus and Note 8 did. Charges WAY faster than Samsung and yes fast charging still works when the screen is on, unlike Samsung phones where fast charging stops working when you're using the phone.
Battery lasts all day if you're not playing games constantly.
No waterproofing and no wireless charging, but I honestly don't care about those.
No dual speakers but I also don't care about that either.
1080 not 4k display but it still looks great.
I got the Chinese version and I went through hell to make it as close as possible to what I'm used to but I'm used to it now. My notifications coming in just fine and nova launcher working as usual. My only issue is not being able to display Google play music widget on lockscreen.
Durability is not an issue for either, a good screen protector and a case does it for me. There are motorized cases that cover the whole phone in case you're wondering. I rock it with no case most of the time to be honest and yes people do ask me what phone is that ALL THE TIME especially when the camera pops up.
My advice, yes go for it but get the international version unless you wanna spend a couple days tailoring the phone to your liking.