1. Zowie EC2-A (my main)
2. Logitech G400
3. Logitech G700s
4. Logitech G502
5. SteelSeries Rival
Oh man this list actually required some thinking on my part. This is not going to be super technical, just what I felt with the mouse. I had a Logitech g400 (I think before they made a sensor switch) since early 2012 and lasted me to the summer of 2015. Got rid of it because it developed a double click issue that drivers couldn't fix and the scroll wheel was just done after constant use. The time I did have it, it was a great ergonomic mouse that had a great overall feel and decent sensor (Used to think it was the greatest, but more on that later), but the only gripe about it was the gripping on it.
Than around 2014 I got a G700s to go along with my G400 at the time. So when I wasn't gaming at my desk, I can just lay back on my bed and use it from there (duh). In my opinion, it's the best wireless mouse; it had minimal-to-no lag at the distance when I was laying back on my bed, could be wired or wireless, portability, and most importantly the programmable buttons are actually durable and very helpful. The only con I could see with it is the weight of it, it's not adjustable. Other than that, I still use it to this day and overall it's a great mouse.
So when my G400 broke in 2015 I was just using the G700s for a placeholder as my main mouse. So when I was looking for a new one it came down to 2 mouses; the Logitech G502 and the SteelSeries Rival. I ended up getting the SteelSeries Rival and man what a great mouse it was if it worked out for me. I got rid of it because I had to RMA it twice because of a faulty scroll wheel and another because of a bad sensor on it, so I was tired playing a lottery for that mouse (maybe I just had bad luck). But the brief time I did have it though, it was basically a G400 that had even better customization options. The software that was used for it, is still the best program I’ve used on any other mouse. It was easy and simple that never failed on me for the brief couple of weeks I had it. Sadly it wasn’t meant to be.
After that fiasco, I went with my other option, the Logitech g502. And let me tell you something, if it wasn’t for the hideous build design, I would be still using it to this day. Out of every mouse I have used so far (even the one I’m using now) it has the best sensor I’d ever use on a mouse. It was silky smooth and stopped perfectly on a dime. The customization on it was second to none as it had 11 buttons you could program, CPI all the way up to 12000 (though I use 800 for all mice), and adjustable weights. So why did I get rid of it? The build design and weight. Regardless of the 11 buttons, I simply did not like the design of it. Aesthetically, it is not pretty to the eyes unless you like that futuristic look. As for the weight, even on the lowest adjustable one it was still pretty hefty. Those are my personal gripes with it, but overall it is still a fantastic mouse.
After using the Logitech g502 for like 5-6 months, the 11 buttons were starting to become a con and overall I was just getting sick of it. So I was in the market again that would fit my needs this time. As I was looking for a new one, a friend kept pestering me of how good the Zowie EC2-A is over and over again that eventually let me borrow it for a few days to even convince me. Boy those few days made up my mind. I purchased it in mid-February, right before the recall as they were improving the sensors on it (Didn’t want to wait for the new ones). It has best ergonomic design and feels like a much improved version of the Logitech G400 that I fell in love with. The weight of it is actually really light and it literally is just plug and play. To change CPI settings there’s a button on the bottom that you can change from 400 CPI, 800 CPI, 1600 CPI, and to 3200 CPI. Though there is only 4 settings it’s perfect for me as I only use 800 CPI. The sensor is a step below the G502 but an upgrade over the g400. As for the design of it, I love the low-keyness and simplicity of it. As I said before, the extra buttons on the G502 were becoming pointless when I really only used 2 of them, so the EC2-A is perfect for that. Just overall the Zowie is exactly what I wanted in a mouse, pretty much my end game.