The 1st start and 2nd start are no issues, even starting within 20 mins of shutdown presented no problems (following the checklist and obseving the FLI [first Limit Indicator]).
I have flown one in the north of Aus with a after market aircon fitted - "Metro Aviation Air Conditioning".
You could feel cold air if you placed your hand over the vent, but when kitted up with full flight gear and a cabin as big as the 145 IT DID NOT CUT THE MUSTARD.
Reports are that Metro are working on a mod to improve the airflow (capacity).
In saying that, it was better than none at all as the inlet vent for ambient air is only about a 4inch diameter.
Overall, a very good pilot machine.
800
T