Very simply, I highly recommend this hotel to anyone staying in Frankfurt.
My family and I stayed in a Junior Suite here for a night in May, a conclusion to a 20-night trip through Western Europe. This hotel compared favorably to every hotel we stayed at along on our journey (which was almost entirely "5-star" hotels), and the value was extraordinary.
The value of this hotel was the best that I've ever experienced. It truly is a high-end hotel, yet we paid middle of the road 4-star prices. The size of the room was exceptional, it was well appointed, the amenities (including a free minibar) were great, and the "exclusive" invitation for a free drink and snack was a nice touch.
I thought the location was excellent, and service was good.
I highly recommend this hotel.