We stayed 6 weeks at the Wilton House and really enjoyed our stay. The private bush surroundings, quick access to the trails in Otari-Wilton's Bush, and the parade of birds to watch all day were the highlights.
The apartment worked really well for what we needed it for- my partner made a comfortable working space in the lounge and the WiFi was sufficient for him to work remotely with some video calls. Our toddler loved having her own room and lawn to run around on.
Kitchen is well stocked with cooking equipment and there is a full laundry with washer, dryer and basin which makes everything so easy. One of my favorite parts was the clothes line, which is on the covered patio, so there was no need to bring the washing in if it started to rain. We hardly used the dryer since it was so hot and sunny during our stay.
Downsides were that the bed wasn't very comfortable and that as mentioned, you always need to bring a cell phone with you to get in or leave the compound (whether walking or driving). This wasn't a huge issue for us, but you should know in case you do not have a cell phone. We used our American cell phones with no extra charge to call the gate several times a day to get in and out.
It's about a 10-15 minute walk (down and uphill) from the front door to a bus stop that will take you into Wellington CBD in about 15 minutes (bus 14). Also a 15 minute walk to playgrounds and just leave the gate and you're in Otari-Wilton's Bush, which was endless fun for all of us.
Would definitely stay again.