Not tried the Stagg but it's hard to beat the Polytune for readability:
http://youtu.be/v41aNTTs_VI
The Polytune mini is just as readable too, but if readability takes precedence over size, get the full sized one!
I have a Polytune Mini Noir that I want to upgrade to the v2 for the new strobe mode, if you're after a mini one and not bothered about strobe mode I'll do you a deal!