Overall, I'm very pleased with it. It does what I expected it to do...I filled it up with some diluted all-natural cleaner and it gets the grime off my clubs in no time at all (even after some of my clubs had been sitting, uncleaned, in the bag for several weeks). There are only two reasons I give it four stars and not five:First, for a squeeze bottle, it's pretty rigid. That may be due to the weather conditions (ten degrees above freezing)...but I had to squeeze HARD to get cleaner flowing.Second, I'm not optimistic about the life expectancy of the clip and ring they provide for you to attach it to your bag. It's a low-price item, so I'm not disappointed by it...overall, I think it's actually a more durable design than I was expecting when I ordered it. But I'll be quite honestly surprised if the ring and clip are still viable by the middle of July. That said, I'm handy enough that I can jury-rig something if (when) they break, so I'm quite certain I'll get my money's worth out of it.The bristles seem pretty durable, and they do a great number on getting residual dust and mud out of grooves and details on the heads. I was introduced to this product by a couple of guys I ended up playing nine holes with, and they used theirs after every hole, if not every shot, and were quick to sing its praises, so I can definitely say, despite the four-star rating, that it's worth the investment if you're at all serious about trying to keep your club heads clean.
Rating: [4 of 5 Stars!]