Bought our 2002 Islander 270 new. Installed a Simrad AP-12H within the first year and got great service out of it.
Upgraded to a a Simrad AP-16VF and it was a great improvement.
Nearby lightning strike in 2011 damaged some electronics with EMP and replaced unit with a Simrad AP-24VF.
Outstanding units, highly reliable, great performance and features.
I have installed Simrad units for three friends as well.