Great airplane, I teach in one.
Previously flown the Cougar, Seneca I and Seminole for my ME.
Marginal perf. on all of them.
Aztec just rocks, we fly a 1966 C (new engines) and today we outclimbed a Pa28 on one engine.
Ours will climb on on engine to about 8000' or so with 500fpm, obviously at light weights but still.
Lots of 135's still fly with them so valuable time.
Systems compare better to larger airplanes with the hydraulic flaps.
Those will drive you crazy also, it takes some finess to get them down in stages instead of all in one.
Flap, trim. flap trim, flap,trim.
Landings are pretty easy, you can kiss them on with pwr idle and roll out with the nosewheel in the air.
Initially fly in the practice area with very moderate pwr settings, like 18"MP and 2300 rpm, that will give appr. 150 mph which is plenty fast if you come from light singles.
Have fun, fly safe, if your MEI cuts at low alt. sock him one in the yaw and switch.