DH says this deserves ten stars. I have never made rhubarb before, but it was a staple in DH's home. I must say I was very impressed. It isn't quite what you expect for a crisp. DH says it is more like a cookie bar. Either way, we loved it!
I used the jello with sugar as I can't handle artificial sweeteners (the sugar-free stuff has aspartame). Otherwise, followed as given and liked it very much! The topping mixture wasn't really "crumble-able" as it was fairly liquid. It was more "blobs" of dough that I tried to distribute sort-of evenly; it still worked, although a lot of it "disappeared" into the fruit - maybe adding some old-fashioned (or quick) oats would make it more crumbly and substantial? :) Also, if adding oatmeal, I think you could probably use at least 2 more cups of rhubarb, though I do like a lot of topping (I also like lots of rhubarb though! :) ) I will make this again and maybe experiment a little next time. Thanks for sharing!