Nah, I used it as well. It actually was removed during beta, but it was rather expensive. If it wasn't very popular, the price was probably the problem, and not the functionality.
I used it until it was removed in beta (Amerish patch, methinks?). Anyways, since then I have found that flak armor is a much better use of the suit slot. Symbiotic healing was nice but a bit redundant with, and less effective than, your aoe healing ability. My 2¢.
I miss it. I loved using it. I was curious how the final rank of it worked, but I never got to max it out to see.
I never got a chance to try it since most of the beta i ran as an engineer and didnt switch to medic till late.I was looking forward to using it but i guess not,maybe next expansion then .
I maxed it after one of their sorry-for-the-SNAFU cert gifts. It might be placebo, but I felt like it allowed me to do better healing while under fire. I have no idea why they removed it?