I visit Universal when I stay at WH and like Pulsar, I make sure to schedule the drive accordingly so I don't hit the rush hour traffic. And also like Pulsar, I'm visiting Disney parks as well so staying at WH for the location still makes more sense than staying closer to downtown Orlando. I also like a quick getaway to Tampa which is easier from WH than downtown Orlando.
As for a pool...ok, don't laugh...I am a townhome owner and didn't get into my pool (my OWN pool) until 15 months after I bought it!! And when I finally did, it was fabulous! My family always enjoys it while we visit but I hadn't realized how nice it was to relax in my own pool after a park day, especially a hot park day. The townhomes have more of a splash pool so you aren't going to be able to do any laps, but it is still relaxing and enjoyable to cool off, dive for rings, and throw around some splash balls.
As for which to choose for 3 people - a condo or townhome - it will depend on you and your family. Condos are all on one level, tend to be less to rent, and are the closest to the main pool & slides. All the townhomes are two levels, have a splash pool, and are walking distance to the main pool.
Good luck, and have fun!