I'm still undecided about MB+ at DLR. With the new 'Magic Mobile' (the smart watch thingy) there's nothing the MB+ would do (for me) at DLR that Magic Mobile wouldn't enable my Apple Watch to do. The DL version doesn't open doors nor allow you to scan your band to pay. I don't care about games or flashing lights during shows. So for me it's all about scanning in at the turnstiles and at the LL scanners.
My understanding is that the DL app, Magic Mobile, and my Apple watch will be all that I need at DL.
I'll be purchasing an MB+ (with the resort discount) for our WDW trip, but that's not until next Fall and I want to wait to see what designs are available closer to our trip. Not going to buy one now! I know WDW has Magic Mobile, too, but the MB+ has much more functionality at WDW. Once I have my WDW trip MB+, I'll probably use it at DL in the future.