Well after seeing the spec's of the surge suppression it is in-line with most common MOV only suppression used in many low cost plug in suppression strip type devices sold, I don't like the fact that you almost have to have over 300 volt spikes before it starts really clamping which will let through voltages that can still cause damage to your equipment, at 212 volts it only provides 1MA of clamping, that is 100,000th of an amp, may be good for a static discharge but that is about all, the problem is HV transients at much higher frequency's can still get passed MOV only devices as they just can respond fast enough, also don't get hung up on the joule ratings as without other info they can be meaningless as the receptacle surge spec's in the link, mentions DC levels which is quite useless because most surges are a high frequency event.
A good higher level surge suppression will have not just one MOV for each mode of protection but layers of MOV's that can provide a more robust level of clamping at 60hz and below, for transients above the 60hz which most transients are a high frequency event your going to see high current LC filtering and chokes tuned to clamp any transients above the 60hz tuned as a high pass filtering system, in using the high pass method a much higher level of clamping can be obtained down to not allowing any voltages of a surge that is above the 60hz level, most will clamp these higher frequency surges to levels of 50 volts and below well below the damaging level of most 120 volt equipment as it is much below the equipments operating voltage, MOV's can't do this as they are a type of resistor and are not frequency dependent and if you set the clamping below the source voltage then they will try to clamp the source voltage and just burn up.
Sure this level of protection comes with a price, but its a price that is well invested when it comes to having to replace expensive electronics.
You are not going to get this level of protection in a receptacle type surge device or most plug in power strips, some power strips do include some chokes that do offer some level of lower let through voltages above 60hz, but they are not your every day surge power strips.
Keep in mind that every time electronic equipment gets hit with a surge exceeding its rated voltage, the elements within the transistors, diodes, triacs, and other devices that make up the electronics of the equipment are slowly eaten away, and eventually fail shortening the life of the equipment, even if the voltage is only there for a nano second, while MOV's can reduce the amount of damage some what they can't totally eliminate it as the let through voltages are still to high, most all transients spikes are a high frequency event much higher then the 60hz frequency we used, a good example of this is have you ever heard a pop in speakers when a load is turned off or on, this is a transient that just hit your amplifier causing it to produce the pop, I used to do large PA systems for clubs, and it was always a problem if the DJ or band would sequence the turn on of the equipment in the wrong order by turning on the amps first, or turning them off last, I have lost a few HF horns because of it, when I found that using the Trip Lites ISO BAR Ultra 4's would totally eliminate the pops when the equipment was powered through one, this told me they do an excellent job of blocking anything above the 60hz level.
Over the years I have notice that my electronic equipment when protected by this level of protection would last seemingly forever, and not that I have any interest in the Trip Lite company I have been using their equipment for a long time as they have been in the game for a long time, there are other brands that also offer this level of protection but not many.
Take a look at the specs for even the Ultra 4 unit, and you will see what I'm talking about when compared to the above receptacle surge protection:
Trip Lite Ultra 4
Read the overview then click on the specifications tab at the top of the page to see the whole spec's and compare them to the above receptacles spec's and you should see the difference at what to look for in protecting your equipment.
Throwing money at anything less is well just giving you a false sense of security as you will end up spending more in repairing your equipment, and thats how I really feel about surge suppression, which is why I made the statement that I'm not fond of receptacle type surge devices.
