In my experience when it comes to outsourcing IT, if you find the right partner, the results are often incredibly beneficial.
First off, having a service provider handle some of your IT needs usually means you get 24/7 support. Not all companies promise this, but many of them do, as the Core Technology Solutions homepage shows. This can help minimize downtime and get issues addressed quickly; no need to wake up a team member if the server goes down in the middle of the night.
Another advantage is scalability. A team of experienced managed services IT providers will be able to anticipate your business needs and help you set up scalable IT solutions. They can also accommodate peaks and valleys in your IT needs. This means you won't have to worry about hiring more staff during busy times or letting people go when things slow down. The service provider takes care of it all, making your IT operations smoother.
The main downside of outsourcing is trust. Letting someone outside your organization handle your IT means you need to trust them to know what they're doing. However, you can balance this out with some due diligence. Only work with service providers who have a solid track record.