HELP!! Free Flow Waterbed!?

I'm going to get one! My mom is placing in the order tomarrow! What should I expect? Are they comfy to sleep on? Do they pop easy? (My wiener dog sleeps with me!) Does it fit the life of a 15 year old? I understand that it does move alot but its not like I have a husband or someone sleeping with me at all times, But I do have friends stay the night alot. So will it bother them? Please add any other info. I should know! Thanks! (Im getting a Super Single that is Free Flow. It comes with everything and was only 519.99. It will be shipped from Michigan and I live in Missouri.) Should I be concerned that the mattress might get a hole? Once again Thanks!