A 'cheap' unit to have installed but:
- Display very cluttered
- Can no longer remove the speed / alt tapes to reduce clutter
- With a pitot failure I have seen the unit indicate a pitch up and then complete fail
- I have seen a unit indicate large ASI errors which get worse with increased airspeed
- I think it was one of Jaba's crew from up north that had one regularly fail below 40deg south for no good reason (I think this has been fixed with software update)
The above was noticed on 8 - 10 flights in different aircraft.
On the plus side:
- Does a great job at GPS roll steering and can be 'coupled' into a lot of old school autopilots
- I'd trust them VFR no worries
- Aspen do appear to have spares in the country which can be quickly swapped over. The Aspen has a configuration module which plugs into the back of the unit. Swapping the unit out is a 2 minute job.
Beats me how aspen have got TSO on these units. I am pretty sure some of the non TSO'd PFD's have much better up times.