Love the extra length
I really like this brush for cleaning water bottles. You can easily reach to the bottom of the big bottles that my regular bottle brush cannot. I like being able to clean and sanitize the top too. The top is also great for cleaning baby bottle nipples without having to get out the tiny brush part from the regular bottle brushes.
Doesn't suds up the soap well
I really wanted to love this silicone bottle brush because it is easy to sanitize (pop off the silicone part and boil!) and comes with a flexible tip to get into the little nook and crannies. There were a few issues that knocked off a couple stars. First, I found that the tip doesn't fit into the small inner tube of the newer Dr. Brown bottles (the green ones). Not the tiny piping part, but the upper mouth part. Also, the silicone material doesn't retain water so it is hard to create any lather. I feel like the soap isn't being used well to really clean bottles or nipples. However, I like the combo of the brush and tip and it will last a long time, so I feel it was a good investment over the wire bristle brushes and sponge combos that fell apart on the first use.