I have a pair of 180's, they both have been working well. One has a bigger harddrive out of a PB520 that I bought as parts. They use scsi drives. The screens are very crisp. Easy on the eyes. A nice, sturdy vintage laptop that has aged well. I use RamDoubler on both. I use the ac adapter as the batteries died long ago. I use the ac adapter in the car too, as there is a plug in on the dash. The active matrix screen works very well outside!! I would go with either a PB170 or PB180.