Eh. It's a bit rocky at first as you often run out of energy as you switch between Injection and Infusion, and you can only adrenaline probe so many times. However, I think they're great once you get to level 30 and snag Surgical Probe, which gives you an instant heal (and you can spam it if they're below 30% health). I haven't actually played the other healing trees to compare, but I think the Imperial Agent healing is one that gets great once you give it enough time.

I'm an RP player and I have to say - WE NEED CHAT BUBBLES! There's an incredible lack of immersion when the only way we can roleplay with others is by scrolling through a tiny chat box in the corner of the screen, and sometimes we miss what some people say! Yes we might get the odd people going "ROFLCOPTER" whilst jumping around, but we can always ignore these people. Basically, we need this function desperately! Maybe not so much in PvE and PvP but definately in RP. We can already see when the enemy says anyway so there is NO EXCUSE for this function not to be implemented. /2cents.