I seldom used my Palm Vx for the more ambitious, full-computer functions. Pro and ended up also an early purchaser of the Palm Portable Keyboard. So, as an experienced user of both keyboards, I provide this comparison. There is a protective hood that lifts back to reveal a good-sized keyboard with excellent tactile feel. The Palm Portable Keyboard dimensions are close to a normal desktop keyboard.
Pro keys are still large enough for high speed touch typing.
My typing accuracy and speed is quite good with both keyboards, however. Pro which presents the keyboard at an upright angle whereas the Palm Portable lies flat on a hard surface and therefore has a somewhat less natural feel. I have used both keyboards to take notes in all day meetings and both performed very well. At the end of the day I had less hand fatigue with the Palm Portable. It works separately from the built-in memopad database and breaks through the memopad file size limitation of about 800 words.