EXPERIENCE: I have found this charger to be pretty cool! First of all, it was packaged well from Amazon.com, they like to use the air pocket material for packing, which works great, and is less messy then foam peanuts. The charger comes inside a plastic packaging case with both alligator and permanent wiring connectors. It also comes with a warrantee slip and a paper manual. The first thing I noticed was how light weight the charger is, right around 3-LBS, as opposed to my heavy 8-LBS fast charger counterpart.I really like the cables the charger comes with, the alligator clip ends are made of actual copper, which as you know, allow for better conductivity, which is why copper is used on computer heat sinks to dissipate heat. This particular wire also includes an 7.5-AMP inline fuse, with a cover over it to keep water out. At the other end of the wire uses a proprietary connector system, so that you can disconnect it from the charger incase of emergency, without the need to unplug the charger!The permanent style wire, uses your typical battery bolt type connectors, which allow you to permanently install the charger, for year round use. This also uses a 7.5-AMP inline fuse, and also uses the proprietary connector at the other end. All I had to do to hook it up was, connect the alligators to the battery, connect the other end to the charger output wire, and then plug in the power, that simple!The first thing I saw was a steady "RED" light, to indicate that the charger was charging the battery. However, since my battery was at 12-volts at the get go, it didn't take long for the charger to start flashing the "GREEN" light, which indicates battery at 80% charged. Remember, a fully charged battery will actually show 13.5 to 14.5 volts. So, it took a while, charging at a 1.2-AMP interval, to get my battery there.TIP: With a lot of modern day vehicles, they have onboard systems which have a low power draw off the battery at all times while the vehicle is sitting. This is unfortunate, as the charger only charges at a 1.2-AMP interval, any onboard systems sucking that amount, will keep the charger from charging your battery. In this particular case, it is best to disconnect your battery from your vehicle.Once my battery was charged, it went into float mode. You know when its in float mode, when the "RED" light goes off and the "GREEN" light stays on steady. At this point of time, it is not putting a charge on my battery. But it will wait till it drops due to the freezing temperature, and then it will kick back on till its charged again. Think of it like the furnace in your home, the heater comes on when the temperature falls, and turns off when the temperature reaches your set temp setting.CONCLUSION: My fast charger would always be very warm when I used it, but the BTPLUS is only luke warm, you hardly even notice it! My fast charger also emitted a noticeable loud humming sound, my BTPLUS emits a sound so quiet, that you have to put your ear up to the charger to hear it! My fast charger has the ability to cook a battery and destroy it, where as the BTPLUS will maintain my battery and make it last a long time. Sometimes people think that speed is everything, I say no, cause when it comes to batteries, slower is better. The way I look at it is, this is an awesome charger, and I recommend it with 5-stars!