Id say all good if the refurb was done by the actual brand, Third party refurbs id be more wary of.
Although like mentioned id imagine you can always return if not happy.
This is what annoys me within the UK in particular is that its quite hard to find a place that actually has chairs on show for you to try out, Sure the big stores have "Gaming" inspired ones you can try but I've always found these to be a bit naff.
If its high quality/Office boss chair you want there is zero around my area ive found. :/ ...just all online.