Stayed here recently (mid October) and can recommend this place if you are visiting Valkenburg or the surrounding area.
We were greeted by the owner who was welcoming and friendly.
The apartment was well equiped, well heated and spotlessly clean.
5 mins stroll from Valkenburg town which was quiet as it was out of season but still lots of places to eat and drink.
We took advantage of the free swiming at the local pool, which is typically Dutch, organised and again spotlessly clean.
Will be back here for a return visit next summer.