In a word, wow. If you want a more detailed review, read on.
There are a few major areas that I focus on when I travel (which I do most of the year): kitchen, bathroom, bed, living area, connectivity and location. I'll discuss each. I stayed at Mark's for over a month total, so this review is from a long stay.
Kitchen
So happy with the kitchen in this unit! Not only is it a full kitchen, Mark has equipped it fully. Plenty of dishes to eat from AND pans to cook with. Full sized refrigerator means one trip to the grocery store will last 1-2 weeks and there's plenty of pantry space for food too. Often the host has forgotten to leave space for the guests things in the kitchen but not Mark. I enjoy cooking and was able to do so without feeling like I was missing something. Mark even had some basics already there: oil, salt, sugar, pepper, syrup, etc. Oh, and all the water from the taps is filtered!
Bathroom
Full sized bathroom, full size tub, good showerhead (with pause ability), plenty towels & washcloths, shampoo & body wash, walk-in closet, nice trifold vanity, plenty drawer space for toiletries. Everything I brought had drawer space and having on demand hot water was a wonderful bonus. Tip: if the water goes cold, just step back for about a minute and let the water heater kick back on. :-)
Bed/Bedroom
The bed is I think a queen. The bed is comfortable and the pillows have different softness so you can choose the best one. The comforter is medium weight so not too hot. The room has a full dresser to use with a large mirror as well as a reading chair/lamp and an air conditioner. I didn't need the a/c but I'm not usually in during the hot part of the day. Also noticed the bed linens are pretty new. I get allergies from old pillows (dust mites) and Mark obviously buys new pillows regularly because I had no problems. Overall, the bed was comfortable and I always woke up well rested, which is saying a lot because I have a back injury.
Living Area
So happy with the size and furnishings at Mark's place! Plenty of room to entertain both inside and on the back patio (lanai). There is an outdoor screened seating area and a BBQ grill set up with an outdoor dining area next to the ample back yard. The entire grounds are beautifully landscaped and the grill has all the tools needed for cooking. The living room has a sofa (folds out if need) and coffee table in front of a good sized tv. Streaming services provided via Roku so you can watch what you want, when you want. There is also a second sleep area if you have kids.
Connectivity
As I mentioned, there's streaming on Roku so Wi-Fi is provided. The wifi is adequate for most applications but if you want to upload media or do any long zoom meetings you may have to go to Starbucks. For most vacationers this won't be an issue. I work from home so my demand is a little higher.
Location
Mark's location is AWESOME. The subdivision is almost perfectly centered between the end of the road in Kalapana, Volcano National Park and Hilo Airport. The roads are paved almost the entire drive and the property has plenty of parking space. You should buy groceries before leaving Hilo, it's 30 minutes to drive each way. Don't worry, there's plenty of space in the fridge.
Overall, staying at Mark's place is a treat and I'm so glad it was available!