prepar3d has replaced fsx completely, they shouldn't be recommending fsx..out of touch. Logitech
in 2016. the yoke doesn't appear to have changed though i would not be surprised if Logitech
reduced component quality even further.
amazon is the best place to get a good deal on the combo. i would recommend the combat pedals (better construction, metal pedals, though more expensive).
i like the cessna yoke because it can rotate 90 degrees on each side as opposed to 45 or so for the normal yoke. the construction quality is a bit higher on it than the standard yoke.
however, the cessna yoke cannot be modified easily to remove the centering detents like the standard yoke can.
the standard yoke can be modified (voids warranty) so that there is no centering detent. this is a big deal for very precise flying and finding the proper trim point, and learning to trim correctly is a huge aspect of learning to fly real planes.
even after years out of the pilot's seat, about five years ago, using a modified Saitek
yoke and p3d with A2A's light aircraft and PSX (expensive professional simulator dedicated to only 747-400) for the 747-400, i was able to get back into the cockpits of both small prop and large jet aircraft and handfly them with precision without any difficulty. i was able to keep within 50 feet of target altitudes during IFR practice and VFR circuits in both a real 172 and 777-200 with nothing but p3d and psx as refresher training using a Saitek
cessna yoke, Saitek
throttle quadrant, switch panels and combat pedals.
i strongly suggest that along with the yoke, you buy your son some A2A light aircraft such as their 172 and cherokee. they make fantastic training aids. the cherokee is excellent for training if your son's flight school is using older aircraft that have carburetted engines as opposed to fuel injected. if the aircraft is older than the 80's it's fairly likely not to be fuel injected. your son can learn about carb icing and proper use of carb heat like this. A2A did a fantastic job with simulating icing effects - it's not just visual fluff, it really affects the engine performance and can create dangerous situations if used improperly.