I paid the 99 cents to avoid the ads.
The only problem with Words with friends is that you can take your time, which is great for casual settings because you play when you can - which is why I love it. I can play 20 games at once, and sometimes its rapid fire, other people moves are made every few hours. It's on your honor to not cheat, and the game is the ref so you don't have to worry about trying to play a word and losing your turn if its rejected. The only times I've been questioned about things are words that end in Q (just learn them, UMIAQ, SUQ, and TRANQ), and when I break out the science words. Trust me when I say I know what and azide is. I'm sure you have some nearby, and you're damn thankful of it as well.