Any trusted Infiniti service center in Mussafah?

my Infiniti QX50 is due for its 40,000 km service and I'm tired of paying dealer prices. I live near Mussafah so I'd prefer something close by. I found https://infinitiservicemussafah.ae while searching and they seem to specialise in Infiniti, which is reassuring since I don't want a general garage working on my car. Has anyone used them or another Infiniti service Mussafah workshop recently? I want to know if they use genuine parts, if the price was fair, and whether they stamp the service book. Also how long does a major service usually take? I'd appreciate any honest feedback because I'm planning to book this week. Thanks.