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+# I'm Using a Trackball (Logitech ERGO M575)
+
+I've always heard stories about people worshipping the trackball for e.g.
+comfort, precision, curing their carpal tunnel, etc., but I've never used
+one… until now.
+
+Note: this blogpost has no insight whatsoever. It's just me talking random
+stuff about my new trackball.
+
+![Top view of the trackball. It is asymmetric. A shiny blue trackball (3-4
+cm in diameter) is on the left. The chassis on the right is made of black
+plastic, has a "logi" logo, and features two mouse buttons and
+a scrollwheel. At the tip of the left button there are two protruding
+buttons in a vertical layout.](img/ergo_m575/top.jpg)
+
+Joke's on me, the first thing I did after putting it on my desk is to
+instinctively attempt to drag it around. Obviously the rubber pads on the
+bottom stopped me from doing that.
+
+![Left view. The trackball fits inside a socket.](img/ergo_m575/left.jpg)
+
+![Right view. There is a groove along the bottom for the side of your
+palm.](img/ergo_m575/right.jpg)
+
+![Bottom view. A mostly flat surface except for an engraved "ERGO M575",
+a few rubber pads, an on/off toggle switch, a dongle/bluetooth switch
+button, a hole exposing bottom of trackball, and the lid of the battery
+holder.](img/ergo_m575/bottom.jpg)
+
+The hole on the bottom is large enough for me to poke my pinky through and
+push out the trackball.
+
+![Left view after taking out the trackball. The ball leans against the
+chassis and looks glittery.](img/ergo_m575/trackball.jpg)
+
+It turns out, like a regular optic mouse, it's also laser powered.
+
+![Closeup of the empty socket. There is a laser transceiver deep in
+there.](img/ergo_m575/socket.jpg)
+
+The three tiny white dots you see are rollers that support the trackball
+and maintain friction. Allegedly, these were made of steel in its
+predecessor, M570, but now they are plastic.
+
+I've been using this for a dozen hours now, including web browsing, file
+managing, text editing (in LibreOffice and vim), and CAD. Here's what
+I feel about it in general.
+
+## Pros
+
+- It's beefier than my old ThinkPad mouse and fits my hand better
+- Trackballs are cool
+- The Logitech® Unifying™ USB® receiver works out-of-the-box on Linux®
+- The motion is smooth and detection is precise (but I have no proof that
+  it is more precise than my regular mouse)
+- The ball never slips my thumb
+- It saves desk space
+- It's taller and thus less likely to get buried in piles of paper
+
+## Cons
+
+- The right mouse button is too sensitive and sometimes depresses under
+  the weight of my hand
+- The left and right buttons on the scrollwheel are now two discrete,
+  vertical buttons without context
+- It's unfriendly to left-handed people
+- It's harder to orient my hand immediately upon contact
+- Hence, it's harder to switch my right hand from keyboard to mouse
+- Hence hence, I'm more reluctant to do the reverse which puts more burden
+  on my left hand
+
+## Conclusion
+
+There is no conclusion. I told you there is no insight. I just wanted to
+share some cool new hardware. Now go do something else.
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diff --git a/docs/random/index.md b/docs/random/index.md
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@@ -13,3 +13,4 @@ Nevertheless, occasionally I leave a permanent trace along the way.
 - [The most important part of a smartphone is the OS.](smartphone_os)
 - [My Life Goals](life_goals)
 - [I Respect Furries](i_respect_furries)
+- [I'm Using a Trackball (Logitech ERGO M575)](ergo_m575)