The only time I go to hit various clubs is when I am actively looking to replace something in my bag, so I don't do it very often, but it is very common in the US from what I read on a golf forum I spend time on
In terms of feel, a lot of people will tell you 'nothing feels like a Mizuno', but personally I prefer the feel of Srixon clubs over Mizuno having hit various options when I was fitted, with the harshest feeling clubs being Ping. Maybe that has changed a bit with the recent release, but I wasn't a fan of previous Ping clubs
If I had the chance, I would love to give the Cobra King RF Forged MB blades a try, but finding them at a place where they can be hit isn't easy
where are you located?
there is a independent golf shop here, in Aberdeen that stock the RF editions and they have a trackman / fitting bay.