I was really disappointed when I heard that Sheridan's (the previous custard place to reside at this location) was closing. I was a pretty big fan (and regular customer) of Sheridan's since discovering it a couple of years ago.
Upon patronizing Mr. D's, I have to say, though, that I noticed almost no changes / differences. It looked like Sheridan's and tasted almost identical to Sheridan's. And the menu was basically the exact same.
Though, to be honest, I suppose I can comment little on the menu as I never stray from ordering a concrete. If you are clueless (and hey, before discovering Sheridan's, I was) as to what a concrete is, it essentially a Blizzard. However, such a description really does it no justice as once you have a good concrete, you will never again be able to stomach a Blizzard or McFlurry or whatever.
And the combinations for a concrete are pretty much limitless. There are some provided suggestions with cute names for those without imagination. Personally, I prefer to dream up something new. For example, one combo I tend to come back to every few visits is coconut flavoring, shredded coconut, chocolate chips, and M&Ms. It is totally delicious together. Other times, though, I like to go basic and get just one single mix-in, like Snickers.
Beware, though, a concrete made with good custard (like you will find here at Mr. D's) can be extremely filling. I've been known to eat a pint of ice cream in one sitting, but I can often barely finish a concrete from here.
Mr. D's is an outdoor / drive-thru place. There is a walk-up window and a few chairs and tables outside (covered), or you can go through the drive-thru. There's no ambiance or anything. No interesting decor and it's essentially in the parking lot of a strip mall. But it is pretty damn good custard. I will keep coming back for the concretes.