ya its not very hard to replace them i can't remember how long it took me to do it but it wasn't very long at all
over summer I was about a mile from home and all of a sudden I hear a nasty noise, pulled in my driveway and see fluid pouring out. I found out it was coolant draining out so I went to go pull it in the garage and she is cutting out and just about stalling the whole time its running. By this time I was FREAKING out thinking I broke the engine block or something. Turns out the water pump seized up and blew out. Pain in the ass to replace but just think it can always be worse.
It's not hard to change just go to a scrap yard where they pull it and pick one up that's what I did never had a problem since.