I do not own an SMS-1, but I have heard that the user manual from Outlawaudio (SMS-1 reseller, available on-line) is very well written and easy to understand. On the other hand, Velodyne's manual doesn't get the best reviews.

Sony 70" XBR, Oppo 980H, Onkyo PRSC885, ATI1807, Rocket 850/450/300/200, Elemental Designs A7S-450x2