We have tried a lot of the "create your own" pizza places, but hadn't been to Pieology yet. I would say that Pieology jumps to the front of the pack to tie, or even pass Fired Pie. Living in a family of four people who all like different foods, it's great to get to customize my own pizza.
Pieology seems to have a few more options than its competitors, such as thin crust or thick crust pies. They also offer a whole wheat crust. While Fired Pie seems to have a few more cheese options, Pieology offers just as many meat and veggie options as FP. (They both have a good variety.)
All in all, Pieology was a pleasant surprise and I'm sure we'll be back.