I rather use iphone 4 than Android.... like i do now.
Android is a mess with it's multitasking and in general the UI. Those horrible touch sensitive back and menu keys and buggy OS just made me wanna throw the GS to the wall.
My 5 months experience with GS and then managing to sell the phone that felt like it costed 40 euros 50% cheaper has made me certain not to buy another Android phone.
By far best part of it is the community over at xda.