I have the 211si and so far it is a great welder for the things I am doing. I have mostly used it for MIG and Stick but will start farting around more with TIG as I get a bit more time.
The company (for me) is located about 1-1/2 hour drive to Hamilton. I have been there and they were very helpful. I have not had any issues with the welder so I have only reached out to customer service about hooking up a spool gun - they sent me the pin connection layout and the plug end ($10) to connect a different companies gun. I thought that was nice.
You have a few extra features with the pulse welding than I do so I can't comment on that