To use the modern venacular, it "does what it says on the box". It's very simple to operate, without complicated menus to learn.
OK, it doesn't have all the "bells and whistles" of other rigs; but be honest, do you really need them? Most hams I know, don't use half of the gizmos and gadgets on their 'top-of-the-range' rigs.
I bought mine brand new when they first came out, and have used it every day since then. Everyone I've spoken to, locally and dx, remark about it's superb audio; and if I can hear someone, I can usually work them.
The front-facing speaker makes it easy to listen to, especially when 'stacking' rigs; and the mike/key/ext.speaker/headphone sockets are just where you want them.
From new, I've always used the matching desk-mike (EMS-14)and auto-tuner (EDX2) without any problems.
Prior to, and since, buying this rig, I've tried all the usual other makes and models within my budget, but I still keep coming back to it. In fact, I've just bought another one off eBay, to run alongside, or should I say (literally) on top of, my existing rig.
Others may come and go, but my Alinco DX-77s are here to stay.
If, and I do say 'if', I was going to upgrade, I would have no hesitation in buying the Alinco DX-SR8 (maybe one will come up on eBay soon).