However, Weller as a company is far worse to deal with compared to the friendliness of Hakko USA.
I've never contacted Weller, but Hakko's service is great. Very responsive, and they actually stock parts for discontinued items (at fairly reasonable prices, too).
In the electronics lab of the company where I used to work, we had 936s going all day, 5 days per week without a single failure. That's why I bought one for myself 8 or 9 years ago and mine still works flawlessly. I've only had to replace tips a few times. The Hakko irons are very comfortable in the hand, too.
My experience with using Wellers is limited to the older models, so I don't know how comfortable their newer irons are...