I've bought a DT1350 about 2 years ago (or even more...) -- which makes it my personal record holder as my oldest headphone still in active / daily use. It survived several contenders, eventually I switched back every time.
Last December I bought the larger pads as comfort is not its strong point... Did not make that big a difference, but I kept them no for their optics.
Last November I added a T5p, reflecting Theogenes' experience: I, too, almost did not get them due to negative comments here as well as elsewhere. Glad that in the end I decided to trust my own ears -- I'm done with the category 'closed headphone for home/office/vacation use'.
Now I'm really interested in the T1, which of course would lend itself to an OTL tube amp... but would have to live with my Lake People G109P for the time being as I don't want to start collecting amps as well (rest is to low impedance for OTL, so I can't replace the G109).
Thanks @ianmedium for the collection of video reviews in the first post. I find them to be balanced and informative.