The Sundara Closed-Back Version retails in Europe (release date) for 479€, it uses a Planar Magnetic Driver, is very well build and looks very cool with the wooden cups at least for my taste. The headband and the pads (leather outside /soft cloth inside, memory foam) are very comfortable , the clamping force  is well balanced not too tight not too loose, i could wear those headphones for hours of listening with ease.

As for the accessories you get 3.5mm cable with a 6.35mm adaptor, a manual and a cool headphone stand

which at same time protects the headphones during transportation. The provided cable is of good quality but nothing

special. It would have been nice if Hifiman provided a balanced cable  with their headphones  (as Fiio does with their FT3 and FT5

headphones).

Inside & Outside isolation is good. I could listen to the headphones at high volumes without disturbing my

colleagues in the office & also outside noises are somewhat less noticeable.

After a 2 month break-in period the sound improved quiet a bit, although they sounded already good out of the box. 

On paper the Sundaras are easy to drive but i found that the sound quality improves when paired with the right amp.

The best results achieved was pairing it with the Singxer SA-1   desktop amp using a balanced xlr cable as it can deliver a lot

juice to the headphones, while portable units like the Fosi DS-1 dongle or the Hiby R5 II DAP struggled to deliver enough energy

for these headphones to shine especially in the bass department it lacked in punch and dynamics. A very good pairing would also

be the Xduoo MT-604 & Earmen ST-Amp.