Others say...

"Great Product - others that write bad reviews - just don't seem to pay attention .."
This product is wonderful. The reason why some of the other people have had a hard time with this adapter is that the powertip system sticks out a bit from the back of the Mac. If you are not careful with how you handle your laptop with the power connected - it can easily break the tip or the power connector to your Mac. The stock power connector has a very small head and it is rounded. The Kensington smartip system has what I would call a very "normal" type of connector. The downside to this mobile power freedom - is that you have to watch how the plug is resting on whatever surface you happen to be computing on.

Otherwise - great device, power my mac anywhere and charge my ipod to boot! Comes with the three tips listed in the tech details.

The tips are not poorly made and do their job as designed - just watch the connector !!

"Kills your battery"
I was still getting over 3 hours per charge before I bought this charger as an extra to keep at my office. After a month of using it, my battery now only holds a charge for 30 minutes. I'd recommend just ordering a new charger from Apple. Hopefully Kensington will give me my money back so that I can immediately spend it on a new battery.

"One of those situations where 1 star is MUCH too high"
This was the only product I could find locally to replace the power adapter on my Mac when it suddenly went up in flames. I had this less than a month when the tip broke off inside my laptop. According to the local repair shop, my motherboard was destroyed and it will cost $1000 to repair. Even if it doesn't damage your laptop this isn't a good product - falls out frequently, isn't great at holding a connection. Buyer beware!!!!

"It doesn't get worse than this."
I have now purchased this unit twice. The first time, I was thrilled to get an adapter new from a site for $30. I didn't care what it was like. It broke the next goddamned day. The tip outter ring snapped off when removed. That was frustrating but I figured it was a fluke, so I bought ANOTHER one of these. The second one middle tip broke off on the second day...IN MY POWERBOOK. SO I spent five hours trying to remove a tiny piece of metal from my powerbook power in jack. Finally managed to do it with very careful use of krazy glue. This is a piece of garbage. Buy anything else. I have never seen a product so cheaply manufactured. The power unit is fine, but the tip on it will fly apart instantly.

"Good Substitute for Apple's PowerBrick"
This power adapter runs a lot cooler than the 45 watt adapter that Apple supplied with my G4 PowerBook and the PowerBook itself is cooler to the touch. Works great, either plugged into the wall or or my truck. Have not tried to use it on a plane yet because as far as I know, Southwest doesn't have power outlets on their seats. My only gripe is that the travel pouch could be a bit bigger; it's a snug fit getting stuff back in it, especially if you carry an iPod and a Palm SmartTip for it like I do.