We are truly enjoying our swivel armchairs.  Having chairs that swivel greatly simplified furniture arrangement in our great room.  The backs are high enough that your shoulders are well supported.  The width is roomy but not so wide it is a stretch to use the armrests.  
I sent away for fabric samples which came promptly, and the 'custom' chairs themselves came in under a month.  The minimal assembly took only a minute or two.  Great purchase.