My Opel (Vaxhall) Omega 2.0 have been running on MS2extra V2.1.0 the last 3 months with no problems.
I had to upgrade from ms2 v2.89 since i changed my motorhead, and on the new head had no distrubitor(head from a newer engine).
I run 60-2 wheel , wastespark, Fan out, and soon closed loop idle.
With this setup i could remove the old flapstyle MAF-sensor, now the car responds much moore quickly.
Up here in the north of cold Norway we had a couldperiod of -16C, the car started and run like new everyday.
The megasquirt its an emazing unit, great work megasquirt team,