Perfect trainer , lovely and stable good predictable stall chracteristics and vaer capable .
I wouldn't call predictable stall characteristics a good feature of a trainer. Training in a aeroplane that you can easily predict stalls in means that transitioning to aeroplanes in which stalls are a lot easier to get into and less predictable you will be in trouble. Mainly a reason why a few pilots will not fly a Tomahawk. Warriors are not certified for spins either meaning that you miss out on a very important lesson that, even though is not part of the PPL syllabus, a good instructor would want you to know via demonstration or, if you want to learn, to be able to recover from one.
Our club has a very well maintained pair of Tomahawk MK2's (the mark of tomahawk that the tail didnt fall off when spinning in) and Piper Warror II... i've flown a different range of planes and I would recommend the PA38 out of them all as a trainer of choice, i'd say why but no doubt you've heard it all before.