I own a 2001 Jeep Grand Cherokee Laredo. I already had a Bluetooth Sony Deck with Front / Rear / Sub RCA outputs. I started with a 5-1/4" Focal PS V30 Component Set for the front doors and dash tweeters. I left the factory coaxial speakers in the rear doors. I then purchased this sub, an Alpine MRV-M500 mono amp, and an Alpine MRV-F300 4-channel amp. Install went well. I bolted the JL box down to the body of the WJ Jeep being careful of not fitting wiring / gas tank / etc. I mounted both amps and power distribution blocks under the folding rear seats. I then spent a couple days tuning everything, I am using the crossovers built into the Sony Head Deck since it allows me to feather the High Pass and Low Pass Filters with selectable slopes. I set the gain conservatively on each amp, around 10% below nominal. It is awesome. I couldn't imagine having two 10"s or a 12" back there. I've been listening to classic rock, Indie / Aughts / 90's / 80's / Alt Rock, modern pop (with my fiancee'), Hip Hop, Electronic, and even some metal. It sounds great with all (need to adjust gain off head deck though). It is accurate, clean, loud, responsive, and punchy. I'm a bassist, it sounds like my bass rig is in the Jeep. Listening to music with distorted bass, the distortion goes through the mids with rest through sub. There is no latency, they hit in sync. Anyone who says it doesn't keep up with double kick drums or fast transients doesn't have it setup properly.
Pros: Value, great sound, great build quality, easy to use speaker terminals, fast, responsive, accurate, and looks cool.
Cons: Should come with grill.