The location is very good, especially considering you'd struggle to get any sort of small hotel room for this price nearby. You really are just a short walk to the free ferry to Amsterdam Central, although we recommend spending time in Noord as well. We enjoyed crossing the canals and docks to come home in the evenings.
Be aware that the property itself is a static caravan and it's fairly rough and ready, a bit DIY and cold - but not without its unique charms.
Reinhart was friendly and welcoming (although we only said Hi when checking out) and offered a few tips for our stay which we appreciated. Overall we recommend this mostly for the location, the lovely views over the IJ, and the quiet garden (so it's probably at its best in late spring summer).