I'm not a big fan of trackpads. I use shortcut keys a lot but at times you just have to use the trackpad. I can't say if the dm1z's is better or worse than others but it has worked well and feels solid. The dm1z has no pointer nub so your only option is the trackpad. You can always use a mouse but I have the dm1z on my lap or on small tables/tight surroundings, so using a mouse is not feasible.
With a trackpad you will experience cursor jumping due to incidental contact with the pad. It can be maddening. This jumping happens to me no matter what laptop I've used and it happens to me on the dm1z too. However, I was able to adjust the behavior of the trackpad to minimize/eliminate the cursor jumping by using the PalmCheck-Enhanced ACM setting in the Synaptic driver. It takes a few steps to complete but below is what I did.
From the Windows system tray select 'Synaptics Pointing Device' to get a context menu and then choose 'Pointing Device Properties'. This will open a 'Mouse Properties' window. Choose the 'Device Settings' tab from this window and then click 'Settings'. This will bring up the 'Properties for Synaptics ClickPad V7.4 on PS/2 Port' window.
Click to highlight 'PalmCheck-Enhanced ACM' and then click the gear icon that will appear to the right after you highlight the item. You're now in the 'PalmCheck-Enhanced ACM' window. See the 'Advanced Filters' region. Set the 'Starting zone' to be only the upper portion of the touch pad. To do this click and drag the bottom of that green box until you cannot drag it any higher. This will exclude the lower portion of the touchpad which is where the buttons are. Then set the 'Filter Activation Time' to 1 second. This means that if you start in the touch zone and them move to the click zone after the filter activation time expires your mouse pointer will not move. If you set it to 0 seconds the pointer will never move when you are outside the starting zone (e.g. clicking/touching the buttons). This change has helped minimize the cursor jumping I had been experiencing.