It was suggested to me to replace my original, factory-installed speakers with these. I watched a couple of youTube "how to" videos on replacing these speakers, including my rear speakers, but one thing the videos and also the instructions don't tell you (but I WILL) is that to make sure you have a dremel-tool handy. You will be using a cutting-disc to remove some of the plastic from the speaker-casing that houses the original speakers in order to fit in your new speakers. I believe you would be doing this for ANY kind of replacement speakers since the original speakers are more "square-shaped", while all the new speakers are more "round-shaped." Once I figured I could use a dremel and cut away some of the plastic to get the new speakers to sit firmly within the casing, it was fairly easy after that to mount these. Also, I didn't know I had a separate speaker AND tweeter in each of my two front doors - I left the tweeters where they were, I just cut any wiring away from them, since there was no point in removing these (I'd never use them, no one would see them, and cutting them out would have been more plastic shavings all over me.) As I mentioned on a previous review, I probably could have just as easily used a slotted-screwdriver to pop out the door panels rather than being charged the added dollars for a panel-removing tool. Certainly though, if you have never removed a door panel from it's plastic clips before, then having this tool is a good idea. You can share it.
Pros: Price, value, sound (with a few adjustments to your bass and tremble settings if you're using a factory installed stereo, like I am.)
Cons: This is probably going to be the same for ANY speaker you put in your front door(s): you will be doing some cutting of the speaker casing inside the doors which presently is housing the original speakers and tweeters. If you want to get away from this, then spend the obscene amount of money for exact factory replacements, which will surely be a disappointment in sound and quality, but will be a breeze to replace. Take your pick!