I've never used the ones with probes, but am going to start with this new enclosure I'm putting together (nothing fantastic, that will come later) I've only used the digital stick on side ones placed low to the substrate. but the question I have is, is there much or any difference between the ones made for herp enclosures and the household indoor/outdoor ones? are the probes larger/harder to conceal in the cage? or do they work just fine? I saw a thread on here were someone mentioned getting one for around $7-$10 at walmart and figured if they work just as well, might as well go that route.