I've had an iGo juice for about 9 months. I couldn't face buying a 70s style Targus adaptor.

Good
- It covers my power needs in Ireland/US/Brazil and in the air with AA
- Stylish looks and and the blue light given off is just right for night flights.
- I have used it for hours on end off UK/Irish/Brazilian mains with no overheating problems.

Bad
- Not particularly light and compact for travelling
- Sometimes the blue light flashes on and off resulting in no power going to the computer. It seems to be related to the connection coming out of the adapator working itself a little loose, and strangely is more prevalent on certain sockets within the house. More a niggle than a problem
- It was quite hard to find accurate info on which of the two models had the correct tip for my laptop. IIRC websites had conflicting info.

Overall I'm quite happy with it.

I have a Dell Inspiron 5000 laptop so it's quite old. The adaptor comes with a variety of tips and whilst many Dell models are listed in my compatibility guide the 5150 is not one of them. FWIW, the tip for the 5000 is 7mm sq with a curved top with 3 small female sockets and 3 guiding grooves on the middle top, and 2 bottom corners.