This hotel can unfortunately not be recommended. The hotel itself was acceptable - nothing special but nothing bad either.
The service level is another matter. First of all, be aware that (I have never experienced such a thing before from an airport hotel) the hotel charges you roughly 10 CHF for a return transfer to the airport. This was not advertised very well and when I told them upon check-in that this is very unusual one of the employees starting arguing strongly that this is completely normal as they use a third party vendor for the service - it is not and the other hotels I have used in Kloten does not.
Secondly, the vendor in question did not allow me the transfer back to the airport the following morning as I had booked (and paid) for a wrong time slot - the buss was empty let me tell you - but he rather choose to create a completely unnecessary heated situation.
Thirdly, as I ventured back into the hotel to voice my displeasure, the hotel staff took zero responsibility for their vendor - completely tone deaf.
Long story short, hotel is acceptable, service is NOT, I cannot recommend staying here when there are several other good alternatives.