I'm using libinput. It seems fine to me. No trackpad has come close to my MBP trackpad. However, this one is fine for my purposes. I will say that I'm not a heavy trackpad user though. I use a tiling window manager and use vimium to scroll in Chromium.

The only modifications I made to the stock configuration was to enable the following flags in my Xorg config:

  Option "DisableWhileTyping" "0"
  Option "Tapping" 1
  Option "TappingDrag" 0

Enabling tapping makes it match my preferred tapping behavior I had on my MBP. I disabled TappingDrag to prevent spurious drag events. The first flag was to let me use the trackpad while typing so I could do some light gaming using the trackpad.

On the X1 gen 5 using synaptics it misses proper palm detection. Oftentimes I accidentally place the cursor at odd places when typing. truly annoying. Possibly there is a fix. any pointers appreciated.