I've stayed twice now at the Van der Valk Hotel De Biltsche Hoek near Utrecht for business meetings. Each time I was welcomed with a smile and the attentive and polite staff were eager to help throughout my stay. The rooms are large and comfortable with modern decor and comfortable beds. The food at the restaurant is excellent, varies according to season, and is good value. There's an indoors swimming pool, fast wifi, and a choice of dining spaces. The upstairs meeting rooms are well appointed and the staff ensure you have everything you need without charging excessive rates for hire of extra equipment. The location is easy to get to from Utrecht and less than an hour from Schiphol airport - about 30 minutes by frequent train to Utrecht then a 10-15 minute taxi ride.
Why not 5 stars? I'd like to see tea/coffee making equipment provided in the bedrooms, the decor in parts is quite dark and brown, and the site is sandwiched between two roads so it's not particularly beautiful and there is some (not excessive) road noise.
However the friendly welcome, polite and professional staff and good value for money mean it's very likely that I'll continue to use it as a venue when bringing together people from several countries for meetings.