I got the aftermarket for $17 this past summer, no problems with them yet. The quality seemed good on the aftermarket I bought, though the font lettering was slightly different. I'd never have known if I didn't have both to compare against each other.
If you reuse the original ribbon cable so you don't have to fish the new ribbon cable through the steering wheel (which is the most work of the whole replacement process), they are very easy to install (takes maybe 10 minutes the first time if you reuse the original ribbon cable connecting them) so even if they only lasted a couple years, I'd rather pay $17 at a time than $110 for that, but I do expect them to last more than a couple years. Remember to disconnect the battery for a few minutes before removing the airbag.
There was one issue and my memory is pretty fuzzy about this, but I seem to vaguely recall that maybe the original ribbon cable connectors might have had one of the pin header sockets blanked out (no hole in it?) as a method of keying it so it couldn't be plugged into the ribbon cable backwards, and I had to break (bend until fatigue cracked) off that pin header pin on the pod, which I saw was unused but present on the aftermarket PCB but that pin was not on the original. I took it apart to check. I hope I explained that well, it would be obvious to see this once it is time to plug it in. If you do opt to instead install the new ribbon cable, then this whole paragraph can be ignored, but it's far easier to break off the pin in a few seconds than remove the old ribbon cable and fish the new one into the steering wheel.
Before installing mine, out of curiosity I took one of the rubber covers off to see what was inside. Nothing much, just switch and LED (instead of incan bulbs) but that rubber cover is really fiddly to try to get back on, something about a groove and tab plus pod housing friction tabs that latch onto the PCB so it's press-fit, that took almost as long to get back together (worried I'd break it so was cautious) than it took to install the whole thing in the steering wheel.
In other words don't bother trying to replace just the covers as mentioned in your other topic, replace whole switch pod assembly. Besides, I don't even know if new aftermarket covers attach in exactly the same way, not sure if it's mechanically possible to put new aftermarket covers on the original motorcraft switch pods. My original, now 24 year old covers were too disintegrated to properly compare to the new.
One thing I consider an improvement on the aftermarket over the OEM is the aftermarket use LEDs. My original had already had one pod opened up to replace a burnt out bulb a few years back, so in theory the new pods will never have the LEDs fail within lifetime of the vehicle. They are soldered on LEDs, not some kind of socketed LED retrofit bulb. I should have taken pics of the new one while taken apart, but didn't.
