Very easy, very good experience. Within a few minutes I had found the repair part I needed, ordered it, paid for it, and was done. Maybe six minutes total.
Pad (aspen) for: 10/12 sd/dd (requires 4
Pad (aspen) for: 10/12 sd/dd (requires 4 per side) (21 1/2 x 24) sold individually
Buy this part and as many parts as you like and pay only $9.99 shipping, within the Contiguous United States.