I've been using it for a couple of years now. I remember when I first started to use it it wouldn't stay in place and would kind of lower itself and become INSANELY uncomfortable...but as I continued to use it it got more comfortable to the point where I can't even feel it anymore.
Of course, I still get leaks on my heavy days, but that's just due to me being lazy.
This summer I went on a camping trip to a really remote area without bathrooms or running water or anything like that. Five minutes before my friend came to pick me up, I realized that I got my period (it's nice and irregular like that)...so I took my divacup into the wilderness with me. I have to say...there is no way in hell I could have managed three days in the woods with pads or tampons. All I needed was a bottle of water and a five minute walk into the woods and I was set =)
So if I can manage to use this thing in the forest, you can manage to give it a try with plumbing!