I didn't have the opportunity to meet Andre and Joel in person, but the instructions they gave to pick up the keys/enter the apartment were extremely easy. Our flights arrived earlier than we had expected, so they were also gracious enough to let us check in a bit ahead of time to drop of our bags which was incredibly helpful.
The apartment itself is just as described.. clean, comfortable, functional, and in a great location. We were able to walk to most attractions (Pike Market, Great Wheel, Ferry Terminal, Monorail to the Space Needle), as well as countless shops and restaurants, in 15 minutes or less.. and for those we couldn't walk to, it was a quick 10 minute walk to Westlake Station for any number of buses, as well as the rail line to/from Safeco and SeaTac Airport.
We didn't have to contact them very much, but Andre and Joel were always quick to respond and extremely helpful the few times we did. Would definitely recommend this apartment and look forward to staying again the next time we're in Seattle.