Good news: It works great, and really keeps you in touch and always accessible.
Bad news: It always keeps you in touch and accessible.

Once I bought this program, I found that everyone was text-messaging me all the time (When my computer is turned off, my normal Instant Messaging iChat NEVER TURNS ME TOTALLY OFF. Example: When I shut down the computer, iChat shows a telephone-icon that allows people to IM me anyway!)
I e-mailed several times for iChat2Cell support, and was told that the best way to solve the problem is to pay the few xtra bucks a month to the cellphone company to have text messages be free.
Problem is, I don't want to be getting text messages all day long on my cell phone, and there doesn't seem to be any practical way to close the floodgates.