So, I bought this to replace my CM Storm Spawn (the red one). At first I was kind of salty. I read the reviews that said it was much bigger, but thought it couldn't be too bad. To be honest, it's very similar to a normal sized mouse. It's definitely not a "big" mouse at all, but compared to the old Spawn and Xornet which I used before that, it's definitely bigger (see pictures for comparison). My only gripe is that when I move the mouse down, it touches the palm of my hand (claw grip) where the Xornet and Spawn did not because they weren't as long. But I can live with that. Why? Because the sensor in this mouse is HUGELY more accurate and responsive (polling rate, maybe?) than the Spawn and Xornet I used before this.I legitimately felt a HUGE difference in the accuracy compared to the Spawn and oh, baby does it read PERFECTLY! I flicked my hand and it actually read the entire flick, it didn't judder or skip in the middle. I was actually weirded out at first because I'm not used to it actually reading those flicks so well.The first thing I did when I plugged it in was download the software, where I set the sensitivity to 800 (the same setting I used my Spawn at/the lowest of the 3 default settings for the Spawn), and set the middle mouse button (below the scroll wheel) to change the colors, though I may set it as a second way to press the scroll wheel button instead, as the scroll wheel is a lot further away than before (when using claw grip, compared to the Spawn).The materials were a little weird to get used to at first. I agree with others, that the mouse clicks feel amazing, but the side buttons are definitely a step down in quality compared to to Spawn, but they're definitely not bad, they just feel out of place on an otherwise high quality mouse (long, empty feeling throw when pressing). I also miss the soft touch rubbery feel of the Spawn. My wife (who I showed the mouses? to side by side) said she thought I was downgrading, because the Spawn has such nice material feel compared to this. The texture helps, and it feels very premium in the hand, even compared to the Spawn (plastic is definitely better quality), but the rubber thumb grips are gone along with the soft touch layer over the left and right click buttons. I had my Spawn for about 3, maybe 4 years, and the left click rubber wore off in some places, but it held up exceptionally well, and only wore off because my 10 year old nephew has been scratching at it playing 8+ hours a day in the summer while I was at work. But either way, going away from that amazing, grippy, rubbery coating and rubber thumb rest was definitely a mistake on their part, but again, the sensor and high quality feel makes up for this in a big way.RGB? It's RBG, the software is confusing and lags the mouse when changing settings. I couldn't get it to switch or change colors (no idea how, even though it's laid out in front of you), and after you change color settings, it took my mouse 5-10 seconds to actually switch, switching to a weird color combo, turning off, then going to what I chose. But it takes too long and it's buggy, so go in there, change what you want to change, and leave it. I set my DPI change button to go through the different color choices. It does look nice, not distracting at all, and not crazy bright, so in the sun it can be a little hard to see. But I didn't buy it for the RGB, so I'm happy with it.It also came with some extra bottom feet, or pads, but they have 3M on the bottom, so it looks like they're just replacements, not hot swappable, smoothness options.The weight is fine IMO, definitely heavier than the Spawn, but I honestly didn't notice a difference until I thought to talk about it, it feels good, I don't think I'll be breaking it open just to take out the tiny weight. It's a negligible difference.The cord is nice, it has a thicker top where it touches the mouse, which is where my Spawn cracked, so that's a comforting improvement. It's the same sort of cord as the Spawn, so not thick, light, not braided, I like it. And the USB end of the cable has PURPLE plastic inside, which is amazing and it makes me sad that I can't look at it all day xD.That's about it, I tried to cover everything. Happy with my purchase. It's much higher quality in every way compared to the old Spawn or Xornet. The sensor blows the old ones out of the water. It's accurate to a point that I didn't even realize how much I was missing. It's comparable to the 60hz to 144hz upgrade I just had. It's a night and day difference in terms of accuracy. Idk if the Spawn had acceleration or not, but this DEFINITELY does not. It's 1:1, amazeballs.I hope this was helpful to others looking to go from the Spawn or Xornet to this. I do wish it wasn't as long, but other than that small gripe along with the downgrade in rubbery feel, I couldn't be happier. I'd give it 4.5/5 stars if it was an option. Fix those two gripes (and maybe the software) and this would be the end all be all comfort mouse for gamers on a budget or not, imo.