Ventajas
If you just have certifications and no experience, you probably cannot get a job elsewhere doing anything but helpdesk. Here, at least, you can work with servers and networking equipment. You'll get paid less than Helpdesk though.
Desventajas
No one will notice what you do, whether you are pleasing customers or ignoring or enraging them. You will be expected to work any hours you are needed, but compensation is not enough to cover cost-of-living and there is no OT paid. There's no one on the team that can handle complex issues, because as soon as someone has enough experience to get a better paying job elsewhere, they quit! Management will not pay the salaries of Sr. Network technicians, so everyone handling IT Services is very junior.