I overall really had a straight-forward and positive experience using The Black Tux, and I will definitely consider them in the future.
They asked for minimal measurements, so it was pretty easy to order the right size.
I received the suit a few weeks before the event and everything fit well except the pants were a bit long and the shoes a bit large, but I quickly notified them and I received some nicely fitting pants and shoes with plenty of time before the event.
After the event was over, I peeled back the shipping label on the box I initially received, and the return label was underneath. I put everything in the box, dropped it off at FedEx, and it was all done.
Bottom Line: Yes, I would recommend this to a friend