Don's place is right beside mission beach (a few minutes walking), and a really good value for money. The place is exactly as described, close to cafes and restaurants. Parking is fairly tricky though (we knew that upfront, it says so in the description and pictures), but we still ended up scratching our car one time :(
We traveled with 2 young children (one of whom was a crawling baby). My older kid loved how close we were to the beach, plus the available beach toys, beach towels, etc. We walked over to the beach often during our stay. Don also made a pack-and-play available for us on request since we had a little baby. The bedrooms are both fairly ok sized, and we connected the single beds to make a larger bed for us. The place is in pretty good shape (but don't expect a 5-star hotel). Having a well stocked kitchen was especially good for us since we needed to cook food for the kids often.
Don was very responsive, and the communication was excellent. Entry/exit was great since it was keyless. He also ordered some extra cleaning liquid and a mop for us since we had a crawling baby and requested something to be able to keep the floors clean.
The location was the best part - literally 2 min from the beach, and a cafe pretty close by where we would often grab breakfast. There is also a nice backyard but we didn't end up using it much - we would just head straight to the beach. The views from the house aren't great (road on one side, and just a wall on the other) - which of course we knew going in from the descriptions.
The only slight con was the parking - although just having parking available on mission beach was helpful (street parking isn't great), having to fit 2 SUVs (one of ours, one from the renters who stayed in the upstairs unit), made parking very tricky each time. We ended up scratching our car on the wall once while parking - completely our mistake, but the amount of space available is limited. Again, we knew parking would be tricky from the description, so it wasn't unexpected - and we should have been more careful.
Overall, if you're looking to stay close to the beach, Don's place is great value for money. That + Don being super responsive is a great combination.