Diehard M570 user for decades. Been searching for a replacement since Logitech discontinued it. Every mouse I tried had a draggy trackball. Hated the Ergo. Just bought a Nulea M501 trackball mouse from Amazon for $32USD. Has the features of the Ergo, minus the tilt plate; internal battery, pairs to multiple devices, etc. It FEELS like a nicer M570. To me, the Ergo did not. The Nulea trackball is buttery smooth and it pairs/connects virtually instantly. I love it to pieces.

Nicely done review. I appreciate the deep diving into handling details

Nice review. :) I just got this trackball today. So far I haven't noticed any scratchiness. It's been smooth as silk for me. My last trackball was an Elecom. Unfortunately, it only lasted a few months before the left mouse button started being inconsistent with its clicks. I'm hoping this one fares better. I was really impressed with two things with this trackball: 1) The software setup was seamless. As soon as I connected over Bluetooth, the software started downloading. 2) I love the scroll locking feature. Push the scrollwheel to the right, and you can scroll horizontally or vertically just by moving the trackball. Nice! I have it connected via wireless radio signal now. Hopefully the battery lasts a good long time. My last wireless trackball, I ended up spending too much time replacing the battery.

Is it possible to have your opinion on the perixx 720 as far as material switches and other details are concerned? Thanks for your work :)

If you can, review the ELECOM EX-G PRO (M-XPT1MRXBK). I bought it together with the Kensington Pro Fit Ergo and the Perixx PERIMICE-720, and returned all of them. I found the Elecom to be so cumbersome, I was always turning the mouse around, almost impossible to use. Great video.

Did you have any issues with the durability of the buttons on those? I've bought a M570 when it was released and had to replace it after 4-5 months of usage due to the switches were completely worn out. I got another M570, and the same thing, the not-clicking, the unintentional double clicking and other issues started again after 5 months (the switches were clean and the battery fresh). After that, I got an Elecom trackball and the switches are still good (like 3 years now). I really liked the M570 thou, but I didn't want to pay $60 every 5 months for a new one.

Dude, you are right about the sticky ball. How and where do I find a substitute that you mentioned?

You really should check out the GameBall!

My M570 died on me today got the M575 due to cost and I just swapped the ball and its perfectly smooth but yeah out of package it was horrible in comparison with how scratchy it felt.

which lack of Scroll Wheel Tilt function!!

$50 is not exactly in my budget. The Elecom EX-G looks similar and it's only $30. I have at least a half dozen M570s and I'm so tired of having to replace them "case creak"? - not familiar with that phenom but the thing that's intriging me about the Elecom you mention is that, rather than the logi ball sort of gliding on those 3 tiny bumps, the elicom claims to sport 3 actual roller bearings! I went to the logitech website to get specs on the m575 and there is no mention of 'click lifecycles'. I forget the brand names of the mice now but one claimed 10 million lifecycle clicks and the other only 3 million - so I'm curious about this logi mouse. Thoughts? I gotta try and find your review on that elecom now. thanks

Trackballs like this are dangerous for arthritis when used often. Trackballs with a central ball are more anatomically correct. P.S. Then i tried trackball first time after mouse, i yelled in cold empty space: "There have you been all my life?!"😂 Now i have Deft Pro, HUGE , two Bitra's and get ready to buy Kensington Expert.

should be wired then I would use it