i want: oven thermometor

so my new oven is a gas one, which i've never used before. and i'm thinking i need one of these to make sure that the temperature is just right. has anyone used one of these before? i hear they are a necessity, pretty much no matter what oven you use. i really could have used one at my last place, that oven was quite wonky.

oh and ps, here's a partial view of my new kitchen that i'm in love with.

and pps, recipe coming soon. sorry, work wants to own my soul!