I did all my professional training with Cabair, and eventually ended up instructing with them for a while.
Yes, they are expensive. The aircraft are mostly very well kept and equipped. The degree of standardisation of the flying operation would put some airlines to shame.
Why do people 'bad-mouth' Cabair so much? Because they succeed where others fail. Remember, those few instructors who have little good to say are probably on airline-sponsored schemes and have ideas above their stations.
All my then colleagues from Cabair are now airline pilots flying jets for respectable operators. So, they can probably fly OK.
In contrast, some of the little flying schools I have experience of, make second-hand car dealers look like Saints.