Signal 2108 is in a beautiful location in the Alpe d'Huez area. It has a very modern design, with lots of comfortable seating and very clean facilities. We stopped once for a vin chaud and a second tiem for crepes.
The vin chauds were very reasonably priced (€3.10 ish) and were made to order.
We found that we were waiting quite a long time for our crepes, but they were definitely worth the wait!