My first saddle was the versatile with the hard bosun seat, the same one you describe. I started out using the saddle with the plastic rollers but quickly decided that using the static attachment points on the saddle would be more comfortable. I didn't feel that the rollers were the smoothest for sliding d's and also the length of the leather strap used on the versatile saddle for the attachment points seems to put the rollers right at nipple level. Not a problem, until you get your nipple stuck between the roller and the leather strap, while you are rotating on the sliding d. This happened more than once for me so I quickly adopted a new method of attaching to the saddle. I do think that you can become quite comfortable climbing in a saddle with a static attachment point, it's just a matter of what you get used to.
I did really like the versatile saddle while I used it and I still climb on it when I can.