Overall the car has proved fairly reliable, just minor infrequent faults arise.
Burning Smell, Located Exhaust, fuel filter clogged.
Coolant Problem, car refused to start, dodgy temperature gauge.
Power Steering, very noisey, always has been.
Brakes, no ABS (which I miss) have failed to apply twice. Airlock in the front brakes, low brake fluid.
The Astra is a very good car, fairly cheap to run, looks don't excite, but the SXI tries to make it stand out from the rest of the Vauxhall range.
Handles very well and is a very fun car to drive, inspires confidence
Peformance, very quick for a 1.6 off the mark, progress through the gears is more leisurly. Engine is very quiet.
Comfort, not great, but adquate, seats typical vauxhall hard and firm, but not uncomfortable.
Vauxhall Dealership experience, terrible, bits of the service were missed but charged, never intereted with any recurring faults, throughly un helpfull, + £68 admin fee!!!!!!
I owned two Astra SXIs both 1.6 and 1.8.
Found both of them very good cars, handled really well, both quick for the engine sizes, generally good fun to drive.
As you mentioned brakes, the 1.8 has discs all round, which are much better!