My time on the Big Island was fantastic at Michelle's townhome. We worked remotely there for a while and the internet speed was very fast (I forgot the exact numbers). They were using an older router at first but when I asked if there was anything they could they swapped a new one within a few days (and should be good from now on). Michelle was very responsive to all of my questions including where to mail a package (which ended up being at a post office 15 minutes away).
The kitchen had pretty much everything we needed and plenty of space so it was great to cook in there. The bathtub is maybe a little small but great to relax in. You're also right next to the pool so it's very convenient to go for a quick swim or lay out in the sun. I hear golfing is amazing in this area and we saw golfers from our back patio but I don't personally golf.
I would highly recommend a car here but I guess you could manage without one if you didn't want to go far. One of my favorite activities was running to A-bay beach and swimming in the ocean.
Since the island is so big its a slight drive to the various activities but it's also nice to be relatively central to many things such as the south activities (Night Manta Ray dive, octopus and seahorse farm in Kona, snorkeling at Captain Cook), north (Waipio and Palolo Valley), Mauna Kea. But you're also close to the best beaches on the island such as Hapuna Beach and the ones on the Kohala Coast which was optimal for me while working.
Before we stayed at Waikoloa we stayed on the Hilo side for a week and that was nice to be closer to Volcanoes National Park, Akaka Falls, lava tubes and the other east black sand beaches. On the drive over we went around the southern point and jumped off South Point (but didn't have time for the Green Sand beach) and also saw a few other black sand beaches.
Overall I had an amazing time at the Waikoloa Colony Villas and Big Island. Thanks Michelle!