I hate when people use this phrase. It’s become so cliché in the last five years and it’s abhorrent and pejorative. It is so offensive and condescending. It’s like the speaker is talking to a child, and really meant to say, “You should already know this. Make sense, idiot?” So if you don’t intend to put down your audience, please use a less offensive phrase such as “What do you think?” or don’t use it at all. It’s superfluous. Make sense?