I do not own a S16, but a HQ16. I tried the S16 and decided if I didn't have enough room for the HQ16 the S16 would be my choice. For those with space issues I highly recommend the S16.
The place where I first demo'd the S16 had a 'cradle' to help hold the quilt up and therefore there was less drag. I think I still have a picture of it. It is easy enough for a handy person to make.