I like to play small pocket pairs for set value in the early stage of tournaments and SnG.
But like saied before will dependes of many factor.
If u has more than 20BB, you can play for set value, but u need to consider your pot odds
, how much the others guys bet? and how much you need to pay for call. The effective stack for see how much you can win of chips, consider the CALL 15, u can win 15x of chips u put on pot?
A lot of sttuf to consider.
And when in middle stage, generally on SnG 45p, is not very good to play for set value, because don't worth put chips in pot so many times, for make a set only 1 of it 6 times. And the most of the time you won't get 15x of chips you put on pot.
Lates i will made a post detailing this subject