I believe that to learn simulacrum is a really useful tool for the sorcerer, both in a solo and a party setting.
the reasons are that a simulacrum of a sorcerer retains more power then the one of a mage as has better versatility inside the spells that the sorcerer knows, he still knows all the spells the original knows and has a good amount of slots, so can be effective in the short time he last. he is also more resilient then the pi, as has to only cast si abjuration but is immune to true sight. and as don't freeze the original can work together with him, or with his pi to have 2 spell casters, probably equipping rov and aop, active at the same time. very useful both in a party and soloing, both at lower levels and later, when also the simulacrum is capable to cast improved alacrity.
the fact that the original is not frozen is also very important in a solo setting, i realized it the time the pi of my solo sorcerer was stunned and the enemies managed to find my invisible sorcerer and destroy him while i could do nothing.
but as a sorcerer can learn only a limited number of spells to learn simulacrum is to loose something other, and at that level there are many useful spells, so to learn simulacrum mean also to have a less versatile and powerful sorcerer. the reasons why not to learn it are as good as the reasons to learn it.
this poll is to know how we, sorcerer users and lovers, deal with this issue.
EDIT: too op instead of to op, but i can not edit the pool choices.