SMS Sets... Should They Be Opened?

I cracked 'em. I was putting together a complete contemporary US all denomination MS/PF collection from a target of 1964 through 2009. Budget doesn't allow to go much further either way on all the denominations. I use the SMS to keep my runs consistent, I developed my own layout for the coins so the SMS takes the place of a Proof issue for that hole. Just my personal preference is all. The SMS sets aren't expensive at this time so whatever you decide, won't break the bank!

The only SMS coins I have are raw and I did not free them personally. I got them, as Crazyb0 said, to fill in the missing proof years for a couple sets to maintain date continuity (and making the set more complete). So, mine are accompanied by proofs in blank album holes.

I have several intact SMS's but when it came time to fill the holes in my Kennedy collection I just bought the raw coins. They are readily available at an affordable price.
I figured that if later I wanted an intact set I'd have to buy it, so I might as well buy the coins and leave my sets intact and have both.

That depends. If you have any missing holes in your album, than I would say crack them open. If not, just leave them in there.