First of all, let's just let that price sink in. $29.99 for a mouse with features we don't always see at the $60 price mark. Ok, the sensor in the Harpoon will probably be lacking in comparison to $60+ mice, but you would expect it to. If you were looking at the $60 mark and wanted to go Corsair, you could grab the M65 with a Pixart PMW3360. The Corsair Harpoon RGB is for those who don't want to spend a huge amount but still want something that is feature-rich and lightweight.
I mentioned that this mouse is comfortable with a fingertip and claw grip but not so much with a palm grip, and as always, mice are very subjective. What suits me, may not suit you and vice versa. I can only give my opinion based on my brief time with the mouse, and although my standard grip didn't feel right, I noticed that I was able to change my grip slightly to accommodate the mouse. Once I had, it was a lot better. I wouldn't tell people with a palm grip not to buy this mouse as I managed to get comfortable with it, but I would certainly say to give it a try somewhere if possible. If you don't get a chance to try it out, but purchase it online, wait a good week to get used to it before you dismiss it completely; it took me a lot longer to get used to it than to a lot of other mice, and I have used most of the Corsair mice without a problem.
Corsair has already spent a huge amount of money getting their CUE software to where it is now, and it is great to see that they have allowed the Harpoon to benefit from it too. With the onboard memory, you can save settings, move to a different system, and carry on the same as before without installing CUE again, which is a great feature.
As you can probably tell, I am a big fan of the idea of this mouse, even though it doesn't really fit my needs. It isn't something I will use as it isn't as comfortable to me as some other mice, but I believe it certainly has it's place, and I would recommend anyone looking for a sub-$30 gaming mouse to really look at this one. Some of my friends recently asked me which Corsair gaming mouse they should buy for their young child. They didn't want to spend too much, and quite frankly, I couldn't give them an option. I recommended a different brand that suited their needs and price range. Now that the Harpoon is here, I would certainly recommend it to them instead.
If using a palm grip were comfier, I would most certainly give it the Editor's Choice award, but as I have to go on my experiences, it just wasn't the right shape. If you are looking for a good cheap gaming mouse, I would certainly recommend you take a look at the Corsair Harpoon RGB; it ticks so many boxes. It is hard for me not to give it the Highly Recommended award, and looking at its price and performance, I am going to give it our Great Value award too.