WOW! These tweeters do work! I have them running off of the 25 watts per channel that my head unit has to offer and already they are really loud! I will be amplifying them with 50 watts per channel soon. Other than loudness, these look great. They have crystal clear quality, and are adjustable. You have no idea how much quality and fullness you are missing until you add a set of tweeters to your system. Well worth the price!
Pros: loud, clear, crisp, fills the car with great high end tones, can be used with little power, but will blow your mind with lots of it, look sexy, adjustable, flush or stealth mount, built in crossovers, competitive price
Cons: large crossover might be hard to route through certain areas, does not come with surface mount hardware, i cannot seem to find the limit as to how loud these tweeters will play.