We got the 500 2 weeks ago, it was an almond color floor model on clearance for $300, a deal we couldn't pass up. After reading through the multiple instruction manuals, testing the water pressure (we have 40 psi), I decided to tackle the install this weekend.
I'm moderately handy, and so far have spent about 8 hours on the installation.
At this point, it's mostly installed with the exception the shutoff valve. Now the the water line is run using a series of connectors that are restricitng volume and inhibiting the unit from flushing properly. I was hoping to get by without breaking out the torch but such is life.
Also, the drilling through the tile is a less than positive experience, after breaking 4 mid-range masonry bits, I took another trip to the depot to buy some bosch carbide drill bits. Really made things easier, something I should have done in the beginning.
I'm going to re-run the water next weekend and will post pictures afterwards.