The Poker 1 worked somewhat ok, so if you can have it for a very cheap price it might be worth considering.
However, please keep in mind that the Poker 2 improved quite a lot of things:
- It is plate-mounted, making for a more solid typing experience at the cost of extra weight.
- It has backlighting, the original only had LEDs for the Fn / Caps locks.
- It has a programmeable Pn layer which supports macros.
- The original had no Esc key on the default layer - you always needed to press Fn + ` to get Escape. And while there was a lock mode to put Esc on the default layer, enabling that mode would mean you couldn't press `/~ anymore.
There might be more, but I can't remember it. I modded my Poker 1 to be fully programmeable, so I no longer suffer from most of the issues.