Good Specter DIY & Shield (1 of each tested)
+ Built with off the shelf components
+ Just feels good building your own device
+ Large screen which makes it is easier to read and display information
+ Dice rolls for entropy with additional app https://github.com/xavierfiechter/specter-diy-app-dice-rolls
Bad Specter DIY & Shield
- Screen seems too reactive. If used with a 3d printed case, need to be careful with the case edges touching the screen
- (Shield only) Cannot remove battery without disassembling the device
Neutral Specter DIY & Shield
~ Large device
~ Stateless though with the Shield version you can use a smartcard
~ Specter Shield is probably more of a collectors item, difficult to obtain