Here's my gut reaction to thinking about Gumby's: Pokey stix. Pepperoni rolls. Alternating waves of grease-induced ecstasy and self-loathing.
Got together with 7 other people. We ordered a ton of food: Two XL Pokey stix and 20 pepperoni rolls. Amazing. Five bucks per person. (Total was 42 and change, because we added three cups of garlic butter dipping sauce.) Everyone was overly full and we had ample leftovers. I called in the order, and the employee was super friendly and helpful. The food was ready on time - fifteen minutes after I called. Awesome.
Why 4 stars and not 5? Because they do one thing (Pokey Stix), and they do it well (and by well I mean perfectly), but there's room for improvement on the pizza.