Craig
I used Autoglym products and although I found they were easy to apply and remove, I wasn't impressed by how long they lasted. Water beading on panels would disappear within 2 weeks of polishing the car.
Seems a lot of folks on here & SNet use either Meguiars products, or Swissol. I use Meguiars NXT polish (purple bottle, green lid) which doesn't break the bank and is just as easy as the Autoglym to apply/remove. I use the wee yellow Meguiars sponges for applying.
The Meguiars seems to last quite well, especially when you use the bright-pink Meguiars carwash foam when cleaning the car too. Doesn't strip as much of the polish off as the old Fairly Liquid used to!
I tend to polish my car about once a month in the late-spring/summer/early-autumn weather, which is maybe just a WEE bit too often.