Bluetooth's Do Actually you use them?

So my son decided to give me his over used iPhone. Took me a week or two to figure out how exactly it all works, but its pretty great. I gave up my old samsung flipper phone for it, but the headset i use while on the road does not work. In my search for a new headset my son mentioned bluetooth....so im here asking. Ive seen a few of you out there with these things in your ears...are they worth it? Do they work good? easy to use? I noticed they have speaker phones as well, i have been eyeing this Jabra Cruiser speakerphon (http://www.wirelessground.com/jabra-cruiser2-bluetooth.html)e, just wanted some advice before i bought something i know nearly nothing about!

they work great just pair it to the phone once and it will remember your phone. i only wear mine in the car though i hate being that guy walking around talking with a blue tooth in. customers at my work do it when im helping them and its annoying when you dont know if the are addressing you or the person on the phone so DONT be that guy. It is so rude im trying to help you but your phone call is so important cause you just have to tell your buddy about what store you are at while trying to talk to someone else, retards i swear.