From Amsterdam:
A4, than A44, take junction 1 Oude Wetering/Lisserbroek. Turn right to Lisserweg, follow that road towards the traffic circle. Take the traffic circle 3/4, then take 2nd road to the left: Kruisbaak 25.
From Den Haag (The Hague):
A44, take junction 1 Oude Wetering/Lisserbroek. Go left, and immideately left under the highway, getting on the Lisserweg. Follow that road towards the traffic circle. Take the traffic circle 3/4, then take 2nd road to the left: Kruisbaak 25.
From Rotterdam:
A4, junction Nieuw-Vennep, follow direction Nieuw-Vennep and return to the higway at the opposite way. On the A44, take junction 1 Oude Wetering/ Lisserbroek. Turn right, getting on the Lisserweg. Follow that road towards the traffic circle. Take the traffic circle 3/4, then take 2nd road to the left: Kruisbaak 25.
Easy to find

You can also plan your route with the route planner at www.routenet.nl

Only five minutes from the A44, junction 1