Does anyone out there use ISA Server for providing internet access for their company? If so, have you had any problems / issues with using it? We were thinking of doing a trial of ISA server and I just wanted to see if anyone had any experience with it.

If you dont use ISA server, what do you use for sharing internet access throughout your company? I have tried several proxy servers (windows based), but have not really liked any of them due to limitations of what I could allow the proxy to do.

Any help would be great.