I just got a One recently. I'm coming from an older original ThermaPen model. So far I like it. My old one did not have any back lighting while the One does. I also like the fact that the screen automatically rotates when I change the orientation of the probe while probing various pieces of meat on the smoker.

Overall I've been pleased with it. My old one still works but for some reason, it has started to not come on when I open it. I have to fiddle with it to get it to come on, even with a new battery.

My only complaint for the Thermapen line is they are made for Right-Handed people.
Us Left-Handed people are treated like the red-headed stepchild.   

My only complaint for the Thermapen line is there are made for Right-Handed people.
Ul Left-Handed people are treated like the red-headed stepchild.   

Get a thermapop then

My only complaint for the Thermapen line is there are made for Right-Handed people.
Ul Left-Handed people are treated like the red-headed stepchild.   

Get a thermapop then

 Bruce. There is a new version, ThermoPop 2 . Has an optional 8" probe, waterproof vs splashproof, much larger 1 1/4" screen, faster response time +++.. To me the 8" would be the one allowing for a more

 comfortable hand hold away from the heat.

     

My only complaint for the Thermapen line is there are made for Right-Handed people.
Ul Left-Handed people are treated like the red-headed stepchild.   

Get a thermapop then

 Bruce. There is a new version, ThermoPop 2 . Has an optional 8" probe, waterproof vs splashproof, much larger 1 1/4" screen, faster response time +++.. To me the 8" would be the one allowing for a more

 comfortable hand hold away from the heat.
     

Thanks for the info.