I am very pleased with the size of this Energizer car charger.  It is short enough that when it is in our dash-mounted cup-holders, it doesn't block the storage cubby just above them.  This is quite an improvement overanother cup-holder chargerwe got a couple of years ago.  That one was much taller, had a noisy fan, and some of the ports ultimately quit working.At first, the only drawback I saw to this Energizer charger was that the blue power light is very bright and annoying at night.  But then I actually tried using it, and I found its performance lacking.  I plugged in my Motorola Droid Razr at 50% charge, then I launched Pandora and listened to music (with earbuds) as we drove on the highway for about 35 minutes.  At the same time, my husband plugged in his HTC Thunderbolt to charge (without actively using any programs).  When we got to our destination, I was shocked to find that my charge level had dropped to 40%.  Using my usual car charger (plugged directly into the lighter socket), my phone would have made a significant gain in its charge during that time.  Certainly it wouldn't have LOST any charge.  Even using very power-hungry apps (GPS navigation, for example), my phone charges while plugged in.I tried this charger again during another trip when my husband did not have his phone plugged in and I was not using any apps.  Over a period of about 30 minutes, I did gain 10%, which is smaller than I'd expect, but at least it was sort of charging.Then I read some of the reviews of this charger here on Amazon.  In the comments of Ryan Winkleman's 3-star review, Energizer admits that this charger is not compatible with his Galaxy Nexus LTE, and may not be compatible with other phones, as well, saying, "Certain phones are not compatible with IPad 2.1a chargers. IPad charging has a unique pin configuration and most other usb devices are compatible, unfortunately some phones will not charge with that configuration."I don't really understand the whole pin and amps thing, and I don't think I should have to.  It's not like I have an ancient dinosaur of a phone.  If this product is known to not be compatible with certain mainstream products, shouldn't Energizer disclose this on the product page?  Or shouldn't it at least be described as a charger DESIGNED for Apple products, rather than just saying that it's "compatible"?  It just feels a little deceptive to me.