Mad Love is entertaining enough, but if you're looking for the next Friends, or even How I Met Your Mother, then you might be disappointed. The show really does seem to be HIMYM "Light", less characters but the characters have the same types of personalities. Also, I think most of the cast has appeared on HIMYM at some point in time.
I really didn't have any expectations for the show, especially considering that I only made it through 2 minutes of the awful Traffic Lights on Fox. But about 3 minutes into Mad Love, I found myself chuckling a few times and before I knew it, the show was over and I had laughed quite a bit. Jason Biggs and Sarah Chalke are the stars of the show and are good, not great, but I was more impressed with the chemistry between Judy Greer and Tyler Labine. I'm a huge fan of Greer and liked Labine on Reaper, but he got stuck on that awful Sons of Tucson(what's with Fox and their awful shows?), so I'm happy to see he got a gig that might lead to something.
Who knows if this show will make it, but as I said in the headline, its better than Rules of Engagement, so much better, so I hope it does replace it for good.