Experience of Panda and Dualogic but not Twinair.Saw a Twinair in the garage that had a ruined engine with a thousand miles on the clock ,because the owner failed to check the oil level.
The Panda was a great car BUT be wary of Dualogic. Unless the car is new and got a good long warranty I would advise anyone not to purchase without doing an extremely long test.
The Dualogic ,when it works, I think cannot be bettered, BUT if dodgy can be a source of expense and trouble. I've had Dualogics for the past 12 years and had troubles with two of the three cars , having to get rid of them as even Fiat couldn't even fix one of them . They decided that one fault , incurable , was 'a characteristic'..
THERE AGAIN, WHEN THEY ARE WORKING CORRECTLY THEY ARE GREAT . You can override the box when it's in 'auto' a very useful thing to be able to do, even in 'manual' it can override you if you do anything wrong.
So, as a precis, buy new, but be very careful if buying used.