These are basically a blatant chinese rip off of the Ardent but with the added benefit of being able to adjust the time and temps (for roasting and infusing)
Unfortunately what I've noticed with mine is the temps are never constant and vary 10d either side. Also slightly damp weed will either suck the silicon cover down mid cook or blow the lid off meaning you might not get an even roast (due to fluctuating heat levels)
Apart from that it's good and I read to infuse it should be 80d C for 45 mins.
Oh and in the UK you can get them from Amazon for £129: amazon.co.uk/Decarboxylator-Activation-Sublingual-Infuser-Container/dp/B08HS3R5MT