I have the recurve riser and switch between 4 sets of either recurve or longbow limbs depending on my mood.
Yes the longbow and recurve limbs will interchange.
They are good performers decent speed,and very smooth with a good grip.
As far as being loud as mentioned above they do take a little work to quiet down but after tinkering with mine it is the quietest recurve I have ever shot. A fast flight style string (astro flight) and staying on the high side of the brace height and wearing bow hush and hush puppies turned mine extremely quiet.
There without a doubt my favorite go to bow. They have excellent customer service, and by most standards an extremely fast turn around on orders. As an example the last one I had Rob make for me was on my doorstep 11 days after I placed the order by phone!
Here are a few pictures.