PMD Nitro CMX opinions?

So recently I've made PMD Nitro CMX my staple nitric oxide supplement and I've found it to be rather strange. I DO get a massive pump from it when i hit the heavy weights and seem to never tire out and find it hard to stop once I'm in the mindset. That's not all that good though. I find myself overworked later and sore as ****. I think, It could just be the whole "placebo effect", that my muscles repair just as fast if not faster even though they're more worked than they should be. Another con imo, when i get towards the end of my routine I get very light headed an on the verge of passing out. I'm thinking this is due to a drop in blood pressure from this ****. So i love the pump but hate the side effects. Can't really decide if it's worthwhile to keep taking. Anyone elses ideals on this particular product?