@chris: yes, we do. But I go to Winterswijk, because it's closer for me. When I visit my sister's familiy near Neuss, I usually go back by passing Venlo - to fill up Diesel.
Every Saturday Venlo is full with German shopping-tourists, other towns in the border-area, too. But for people from the Ruhr-area Venlo is most popular. On Saturday there is a big food-market, in Winterswijk and Roermond, too.
The shop "De drie broeders van Venlo" still exists.
The main reasons to go to Holland for shopping are: Diesel, LPG-Autogas, coffee, cigaretts -yes, Marihuana, too- , some clothes, and also fresh fish, cheese, flowers, plants, and other Dutch specialties, too.
But you must look on the prices, not everything is cheaper. So regular fuel is more expensive than in Germany, alcohol, some kind of food and restaurants, too. So there are several Dutch people going shopping in Germany.
To that location:
http://www.designer-outlet-roermond.com/
the people are coming from far away. So the street from Mönchengladbach along the British Army Barracks to Roermond stucks with traffic every weekend (the Autobahn is still in work)
In the other direction a ot of Dutch and Belgian people go there:
http://www.centro.de/
Forget to go there on Saturdays, it's horrible.
To both locations I have personal memories:
a) before the outlet in Roermond was built, there was a dark parking lot, besides an abandoned factory. In 1998 my K 70 and some others of my friends were broken of, while we've made a visit in the old town of Roermond
b) a mistake by the erecting of the Centro Oberhausen has destroyed original NSU-spare-parts in the value of 100 000 D-Mark. There was only one small open channel, in which all the rain-water from the whole construction-area could flood out. Once around 1994 or 1995 there was a big rainstorm, so the channel was overfilled - and the water had filled the cellar and the garages of a friend of mine, one of the bosses of a NSU-club, who was living besides that channel.
Later on, he had to fight at the courthouse, to get a compensation for the mistake of the planners. Finally they paid it.