Bank Mutual to Stock Conversion. Worth considering?

Received word that a bank I have a small deposit acct with will be converting from member owned to publicly traded in the upcoming months. I will have the option to purchase shares at $8-$12 prior to or at time of IPO. Doing a little research, I see some potential for ST and LT profits. It appears that a large number of banks that undergo this conversion sell within five to seven years. Anyone have any experience or insight they care to share?