makes too much noise
I just used this item today for the first time. The fan makes so much noise you would not use it in your car. It would be very annoying. I plan on returning it as soon as i can.

My long trips partner
I have been using this inverter for over a year and have no complaints. It is great for running XBox, TV and DVD player on those long road trips. This inverter keeps 110Vrms output stably that I measured with a True RMS multimeter. A normal voltmeter cannot give a correct readings. It says that unless use a true RMS reading woltmeter, the readings will be 20 to 30 volts low. It works great for me and my family!

Cannot run an Xbox in a car...
I purchased this unit as I have a DC 9 inch tv, and I wanted to play DVD's on it using my Xbox for the kids. The only thing I plugged into the Inverter was the Xbox, and the TV was plugged into another lighter spot, but was not turned on. Almost every time I turned on the Xbox the Inverter would shut down with the LCD saying "low". And that was even with the car running. When it did stay on the LCD screen said that the Xbox was pulling only 55 watts which is way below the rated capacity. The unit would not run at all with the car off, and was hit or miss with car on....Save your money!!

Read the Manual
The device works great for me. I'm using a 13 inch Daewoo TV and a Sony PS2. Plays video games or can watch DVD's using a standard RF connector out of the PS2. No on-screen interference even with the inverter sitting within a foot of both devices. The air blowing out of the inverter is cool, not even approaching hot. My tv is rated at 54 watts. I don't know what the power consumption is on the PS2. If you read the manual it addresses the fact that some inductive load devices (as opposed to resistive load devices, like a light bulb), such as TVs or stereos, require 2 to 6 times the rated wattage on start up. Also, it addresses the fact that "most AC voltmeters are calibrated for RMS votage under the assumption that the wave form they will be reading will be a pure sine wave, and will not read the RMS value of a modified sign wave (the type of sine wave the Maxx Power Inverter produces) correctly. It says that unless you use a true RMS reading voltmeter, the readings will be 20 to 30 volts low. It works great for me!

Whistler PP300AC
The cigarette lighter plug is poorly designed and will blow your fuse. Before using, take the plug apart and tape the insulation in place. If they can't get this right, I wonder what other problems might lurk. It seems to function OK once this defect is corrected - up to about 150 watts. You will have to connect directly to the battery for more. I replaced the cigarette lighter plug with one from Radio Shack and it works fine.