This is part of a Trane XE800 that was installed in 1990. The outdoor unit has since failed and I'm currently replacing the whole system with a Trane XL14i setup. Since I'm ignorant when it comes to heat pumps and installing them, I was curious to find out if this was a good installation. Check out the photos here. Click on a photo to enlarge.
By the way, it looks fine to me.