It's good in its own way because of how Stray Lambs only allow you to set a monster on the turn it is used where as you could use Limit Impulse at the end of your opponents turn and you can do a normal tribute summon
Stray Lambs will not let you summon the turn you use this, as well, you cannot use it during your opponents battle phase.
I have turned games around by using Soul Impulse as a shield and using the other token as tribute for a bigger monster.
I also regularly will end games by getting a 7-Star or higher monster out in one turn and finishing the match.
You can't ever do that with Stray Lambs.