As the dogg mentioned, no install issues. I got mine from a shop in town for $100 - good guys and I like to support the local economy whenever possible. Just got a set of S60 components for the front - not a "plug and play" install like the rears, but not bad. I'm playing around with the tweeter "tweeking" - the stock location was my first choice but it turns out not to be the best place. Looks like they'll go into the door somewhere. Unbelievable improvement! Now the mids and lows really come alive - I need to Dynamat the rear deck around the S95s and maybe the entire trunk since it's getting a bit boomy.So far, so good...can't see any immediate need for an amp - the stock HU powers this setup nicely!Crank up the ZZ Top!