I'm considering getting a Mack Pack sail cover, and would appreciate
comments from anyone with experience with it.

I have two reservations:

I never liked seeing "similar" covers flapping in the breeze while under
sail, but I look more favorable on the Mack Pack because, at least it
appears, the cover will slide down the lazy jacks closer to the boom. How
well can the covers be rolled up out of the way?

I'm concerned about not having the sail bundled up in a tight package,
particularly with my big roach full batten mainsail. We expend a bit of
effort in flaking the main and cinching the sail ties to get a tight
package, the aft end being the most difficult. How well does the Mack Pack
deal with a big roach main ?

Thanks for any insight.