I run two of them and have been doing so for a while, probably about 7 or 8 years.
I only run the controller then take the output from the Ahha board via a breakout board to Gecko 210 drivers.
We don't run the Ahha driver box as it's not passed for electrical safety here in the UK.
Never had a Ahha based problem, had many problems, machine based, computer based and plenty of operator based ones [ me ] but never a Ahha problem.
Good manual comes with the board and software and we get very good UK support from Ian Eagland at Eagland Machine Tools
http://www.eagland.co.uk
I have though about upgrading these two big machines to Mach3 but to be honest they are bombproof, fool proof and earn me money on a daily basis and for what they do mach3 would probably not give me anything extra.
John s.