Hi gang
Newbie here my bad if this is in the wrong place

Looking for some input on the extra seat topic

I am a BIG guy and am looking forward to a couple of long haul flights next year too and from YVR to HKG and or NRT. No airline chossen yet.
Will probably by an extra seat (economy).

Question:
Has anybody had any good / bad experiences with this practice ?


I have only been forced to buy an extra seat once by an airline (who have since ceased operations) I want to be 50% proactive and 50% comfort for the long flights unless I win the lottery soon.

Any feeback is great.
Zarfman