I plan to sell my own house when we put it on the market in spring. My experience of EA is useless twunts who have no idea.
All but one did nothing more than unlock the door on the viewing and shuffle around after us.
None knew any details of the property you want to know – when was the boiler last serviced, how old are the electrics, what is the parking like, what are your neighbours like… etc… I would much rather talk straight to the owner.
Even when the sale was going through they just got in the way and eventually I went round them and got hold of the sellers details to speak with them direct.
They are having an absolute laugh with the amount of effort they expend and the service they provide vs the fees that are charged.
If you are happy and can afford £6k to pay Gary from Enfields to annoy potential buyers by calling them mate all the time, go for it.