When the only review that I saw on this mouse was a poor one, I decided I should give this mouse a chance with an actual well written review.
First off, when I first saw this mouse online, I was really excited. I had the original Rival and loved it. When my local store had it in stock, I jumped at the opportunity to own the new Rival 700.
Initial impressions: this is a HEAVY mouse. I just retired my Mamba Tournament Edition and that guy was light. This one is definitely not going to be the mouse for everyone. I like have a bit more weight to it now for just the way I game.
Pros: Very comfortable for both palm and claw grips. Easy to reach thumb buttons. Nice features of being able to replace the backplate and Rival plate. Apparently you can get a glossy finish and even 3d print a new plate to replace the Rival logo.
Another really unique pro is the OLED screen. I thought it would just be a cheap gimmick but I find it quite fun. Right now, I have it set as a gif from the Dat Boi meme. Completely hilarious.
Continuing with a few more pros: the SteelSeries Engine 3 software is very nice. Only thing I wish is being able to easily dim the LED lights, more on why in the cons. Very smooth on my Corsair mousepad, just a very nice well rounded mouse.
Cons: I dont have very many cons against this mouse. The biggest thing I've noticed so far is the LED under the palm gets VERY warm, enough to cause your hand to start sweating. A simple slider to dim that LED would solve the issue but I'm stuck with just turning that one off. Is it troublesome enough to return? Not for me really. Other than that con, the last thing that kinda bugs me is the way its shaped on the back side, theres a corner that pokes ever so slightly into the fatty part of my palm under my thumb. But again, that can also be solved by replacing the back plate.
All in all, 4 out of 5 for me. Fun features, very smooth, easy to customize both the hardware and software. Some cons that are easily fixed. Great mouse for some, but if you like a lighter mouse, this would not being a good choice for you.