well....IMHO...you don't need it (meth) and it is a pain in the R-ss to maintain.
If you go with any meth system, regardless of manufacturer, the systems only adds power if you tune for them. That is to say, any properly designed system should be able to take a 536 rwhp Maggie up 50 hp with easy. But is it safer?
Safer than what? You just added 50 HP so if you are asking if 536rwhp is as safe or safe than say 586 with the Meth then NO.
So here is my take...Meth makes more power - no question. However, if you just added a meth inj system to your car "as tuned" it will not make more power. In fact, it can and should loose power. Why? The water meth puts out your existing flame in the combustion chamber. It makes the car run rich too
The extra power gained by meth injection comes from adding more timing and leaning out the fuel flow.
So you just got your meth system and had it installed and tuned - what did they do? chances are they gave you 5 or 6 more degrees of timing at WOT and full boost. Then for good measure they leaned it out just a tab to make up for the meth now being pumped in.
Cool, now your car runs faster but YOU ARE MARRIED to the system. If you run out of meth, you can't go Wide Open under boost until you add the go go juice. For some it is the price you pay for the extra power. but I guess teh old lady in me says once the thrill is gone... I would trade the lower power number for the less hassle
Now with all that said - We have had great luck with Cooling Mist and Snow for our customers. Also if you are at 535 you can safely go to 600 on pump gas before you need the the meth to compensate to the low octane