[dskrvk]

Lenovo W520 with Ubuntu Gnome. The performance is great, and I haven't had any major compatibility problems. The touchpad is excellent and works great out of the box. Build quality is superb.

Some issues though:

* battery only lasts around 90 minutes on full settings, and half of that if you're compiling something heavy. This is a used laptop though, so no idea how many battery cycles it had when I got it.

* switching to an external monitor is annoying. Out of the box it doesn't remember the display layout settings (mirror/extend/etc). If I switch off the on-board GPU and use the discrete one, the VGA port is unavailable. Sending sound over HDMI doesn't always work.

* wifi sometimes gets into a weird state where it can't find any networks. Resetting the driver helps though.

* the only available AC adapter weighs a couple of pounds and is huge. Haven't had any luck finding a more reasonably-sized aftermarket one.

* the speakers are too weak even on 100% volume.