I had a port like the one you describe and here's my experience in answer to your questions

1. If the port site got hit directly with some pressure it would probably hurt more than some other part of your body-especially right after it was put in--but it wasn't a super-sensitive body area at least for me.

2. Since I have veins that roll it is pretty common for me to have to get stuck 2 or three times if someone is setting up an IV, and there's even more pain if they think they are in but actually aren't and try to inject something. So the port was a godsend for me--you can barely feel it when they put the IV in and it works right the first time every time.

3. If by "can you feel the port in there" you mean is there pain or discomfort or some other sensation all the time from having it in, no there wasn't. But it made a bulge under my skin so if you touched that area of my chest you could easily feel it was there--if that's what you mean. But of course that's the point--so the nurses can find it!

Overall, I would say get one. I had no regrets about having one and it made lots of stuff way easier.

Nelie