We, a family of four, spent one week at Julius' place in August 2022. The house was just like in the description, very clean and enough space for all of us. The neighbourhood is very quiet and there is a nice park nearby. We explored Amsterdam by public transport and it took 30 to 45 minutes to reach the center and the most interesting sights of Amsterdam.
We did not meet Julius in person but the arrival worked flawlessly. When we had a question he responded very quickly via text.
All in all we recommend this place if you want to visit Amsterdam.