I'm from the Champaign area originally and was excited to have a new place to try when coming down to visit. Uncle Jack's is a wonderful new addition to Champaign dining!
We came for both dinner and brunch and found our food to be perfectly cooked both times. I had the Steak Dianne for dinner which was cooked exactly to order (medium rare), juicy, tender and delicious. For brunch, I ordered the pancakes and can say, without hesitation, these were some of the best pancakes I've ever had! They were wonderfully cake-y and when combined with syrup had a flavor I would almost compare to a delicious glased doughnut. I don't know what they put in their batter, but they were amazing. My boyfriend and I each had a bloodymary with our brunch and were pleased to find they use ZingZang mix (highly recommend picking some up if you've never had it) which made them delightfully tangy.
The only faults I found there (wait times for brunch and slightly slow service) are typical for a new restaurant and I expect will be worked out the longer they're open. The food was worth the wait and I definitely plan to go back the next time I'm in town!