Excellent product & excellent service. Been using a MK set-up on my RETF terrarium for almost a decade now and never had an issue, excelent preformance long lasting pump & seals and the original white controler is still going strong though I've been thinking of replacing it with the new base controller just for ease of viewing compared to the old white one. Several months ago, back in April, I started a new PDF terrarium and didnt hesitate to go back to MK to get a second system but this time I was extremely happy to find they had a new HT-24 controller that better suited the dart frogs. The unit worked flawlessly till the probe glitched out one morning. After a few e-mails with Ryan, he went out of his way to fix the issue. Like I said... great service. Wont even think of buying a different system. J. Anderson