I have the M Plus 25D with THC. I went with the deeper shelves so I could go 2 boxes deep. Living in Central Texas temp control was a MUST!!! The only issue i've ever had with mine is when the ambient RH is high the RH inside spikes regardless of what I have it "set" to forget. And once it spikes it seems like it takes an eternity to get it to stabilize again. I currently have no water in the reservoirs and it's still a bit higher than my preference of 65%. The only other issue I have is the drain tube that connects to the reservoir. If I pull out the bottom shelf its a bit of a PIA to reattach it. Other than the above mentioned I'm very happy with my "investment".
