There is a difference between a power conditioner and a surge protector. Power conditioning is supposed to give you a pure sine wave, removing all the harmonics and distortions that can be present. These devices are more costly and usually the best device to do this is an UPS.

Surge suppression only protects against higher voltages that could be induced over your power lines.

I agree with everything else TooManyHobbies has written.
Jim