This is compatible with most Bluetooth devices and will run the speakers at a decent volume with the built-in amplifier. The buttons on the face don't have that cheap "blister button" feel (I'm not sure why some manufacturers think using those things is actually a good idea).Likes:Easy to installHigh pass (speaker) and low-pass (subwoofer output) filters with selectable cutoff frequenciesPandora control/iHeart Radio controlOptional satellite radio tunerAdjustable backlight color and brightness - ability to reasonably match the existing dash lightingHands-Free speakerphone featureWired Remote capability for the flybridge (or swim platform...or both)USB socket for controlling/charging older iPods and other devices that don't have Bluetooth (haven't tested it with Android phone yet)You can shut Demo Mode off - no blinky animated distracting stuff.The speakers are an odd size...but sound great! You just have to cut a little bigger hole.And you can't beat the price, especially for a name brand and not something you've never heard of. Kenwood's been around a while.Dislikes:No wireless remote. I do wish Kenwood made a floating waterproof RF remote in addition to the wired remotes. It could be an add-on unit wired into the same control bus the wired remotes use.No TuneIn Radio control.Not much louder/better than what I had, and was only able to use two of the speakers. We'll see how they hold up.This product is most certainly not marine rated. The smallest amount of water splashed onto the dash of our boat and fried the system. This was installed correctly with the proper seal/mounts. Highly disappointed with it.stereo works great. Have not used the speakers yet.Was in the process of rebuilding a 1979 mastercraft stars and stripes and ordered this. This was a great unit for the boat. So far there are no complaints with the items received.radio great speaker should say od instead od idVery happy with the quality and easy to InstallSo 6 months after install, countless off-road trips and caught topless in the rain, these speakers are radio still work flawlessly. Very happy with purchase.