I just wanted to mention that we are using a HUAQIZHENGBANG ZB5040HL which is the biggest drawer type reflow oven I could find actual working space 500x400mm.
we have very good results with this setup and I think the results are much better as with the T-96X drawer types but I have not had one of these...
Before we had a big T-960 which was also really fine but got a bit to big for our production lots so I sold it to a customer, runs nearly every day there without troubles!
I've been using this for some time now, with great results: http://andybrown.me.uk/2015/07/12/awreflow2/. I still have one or two PCBs left, if anybody is interested (Germany).