The old city is quite beautiful, a lot was destroyed in the war.
Great airport with cheap flights home - AirBerlin, German Wings. Easy to drive home via Eurostar too.
You may meet a lot of Brits as there are huge army bases in Elmpt and the surrounding areas. My husband was stationed there for years so we visited the city a lot. Also a lot of head offices for international retail opening there - Espirit, TK Maxx, C&A. I keep getting headhunted to go back there!
Roermond is just across the border, where a lot of Germans head for outlet shopping, but for Brits it's a chance to converse in English, choose English movies etc in the Netherlands?
I looked into the international school and it had a very good reputation and the facilities and class sizes look excellent. I was looking more for a bi-lingual school as I wanted ds to keep up his fluency. However you could supplement with extra German lessons through the school I think.
Lovely properties on the waterside at very reasonable rental rates. Plus Germany is cheap...or to put it another way, good value for money. Germans expect value for their money so it means good quality and portion size generally, cheap beer etc!