I agree with @user175528. We've used the grid extensively in our application too and its built in formatters, editors and validators are really easy to use and its easy to write custom ones as well.
It handles large datasets well (and makes searching through them a breeze). Additionally, its easy to setup paging and sorting.
Initially when I started using the slickgrid, I had wrapped it in another widget so that I could move to another provider if need be, but as of now, it seems to work flawlessly.
I haven't gotten around to it yet, but I will be posing some good slickgrid examples on my blog.