The author has seriously misrepresented this service. By default System Restore will take only 1 snapshot per day. It usually takes only a few seconds and this is normally done during idle time. A restore point will also be made during most software installations. Impact on performance is virtually non existant.

This service can be invaluable in restoring operation after a serious problem. It can mean the difference between a quick fix and hours of troubleshooting. You may never need it, but you will be very glad it is there if you do.

System Restore requires 12% of disk space by default. If disk space is a consideration this can be reduced considerably. Even having only 1 or 2 restore points can be of considerable value.

Unless disk space is very tight you have nothing to lose by leaving it enabled.

Larry Miller
Microsoft MCSA