ryobi has a good replacement warranty and also quite attractive 30 day satisfaction garantee.

however they have very poor batteries, this is not covered under warranty. Also the charge time on the batteries are quite poor as the same with the ozito and the GMC. you can purchase the fast charge range however, the batteries tend to last 6 months.

bosch you have the green range which is household use which isnt bad but they are shocking when waiting for somethin to be fixed. blue bosch which is trade is quite good but again same warranty department and you find yourself waiting up to 2 months.

however, makita which are quite resonably priced and are trade warranty. they have a return warranty which goes back to factory and gets repaired unless it cant be. very rare to see one returned