Very fast can warm up my breastmilk. It can defrost your breastmilk before you warm your milk.
I use it to defrost and warm up the puree cube too!
Very solid quality!
I always choose Philips Avent for my baby feeding stuff, especially is electrical items because they warranty and service line is good.

We were warming our bottles painstakenly with hot water in a very inefficient manner and at 2am in the morning it's a pain to have to go back and forth to the kitchen to warm up the bottle. Now we place our AVENT bottles 4oz or 9 oz in the warmer, set the dial to 1 or 2 depending on how cold the bottle is and by the time I'm done changing a diaper the food is ready.

It heats up 5oz of milk to about 40oC in about 5min in the mid-setting (I placed the dial in the mid-point between 1 and 2). I like the fact that it is not steam-based heating but waterbath based heating, so the milk does not get over-heated by the 100oC steam and the rim of the bottle does not get too hot to be taken out by hands.