If anyone is on the fence about rescue, here is everything I went through as I migrated over. It's a bit of a read. But, I think it covers a lot of what anyone should/would consider.
I was very skeptical of Rescue. I had been flying for 10 years without it, so I didn't really feel like it was something I needed.
But, when I got my Vcontrol I figured what the hell and ordered a new NEO and upgraded it to rescue to give it a shot.
Long story short: It is impossible to have rescue on just one heli. You either have it on everything, or nothing.
There were other concerns, too.
Issue #1: I had 10+ years of muscle memory telling me to hit T/H and try to save it if something went pear shaped.
Option a) make use of the muscle memory and replace my T/H location with Rescue. This did not work for me because I always shoot autos to land. That's all I need...me coming in to shoot an auto and the thing jumping up 20' while it's right in front of me. Or, worse a mechanical failure where the only option is to auto down and my reflexes punch me up 20' higher and I have no chance of saving it.
Option b) put rescue somewhere else. That's what I ended up doing. But, now you have to train yourself to use it. When I finally got all my helis upgraded to rescue I actually planted one hard. I lost orientation and completely froze. My brain was racing: do I hit t/h? do I hit rescue? My fingers wouldn't move. They didn't move. I might as well have turned off the radio. It went in full tilt tail first. If I hadn't had rescue at all I might have saved it. At the very least it would have been a hard auto. I do them all the time. But, this one was about a $450 crash on a 500-class heli.
OK...lesson learned. I practice hitting the rescue switch at least 2x every flight now. And, in the 8 months since I started that I have used it at least once now when I lost orientation. So, that's paying off (still haven't recovered the cost of the rescue on 3 NEOs + the $450 crash tho)
I still haven't (knock on wood) had a mechanical failure which would force me to choose between rescue and auto. I'm still not sure what will happen. It may not be pretty.
And, lastly to expand on my first statement. When I just tried rescue on one heli it simply did not work for me mentally. Every flight, all during the flight, I'm mentally telling myself "this heli doesn't have rescue" or "this heli has rescue" and thinking about which button I can hit in each panic scenario. I wasn't having fun flying. I wasn't thinking about my maneuvers. All I was thinking about was whether I could rescue the model I was flying or not. So, it was clear I either had to uninstall rescue or upgrade the rest of my fleet.
And, the final question: Does it make you take more risks?
For me, no. Now that I've been flying with rescue for a year I'm in the habit of using it. I'm comfortable with it now. And, I would say it's liberating. No, I do not go out and try things that I haven't practiced on the sim. And, I still don't come down on the deck to try new moves...I'm still up at least 1 mistake high. But, what I don't have any more is that pit in my stomach wondering if I try that new move and I blow it if I'll end up crashing. I have 100% confidence that rescue will perform if I need it. And, that frees me up to be more confident in bringing things from the sim to the field.
if it ain't broke, break it.