I love my Octagons (have a 20 Eco and a 20 Adv EX) and this year got the Mini advance, mostly to use as an ICU unit or for small hatches. I love them all!! But.... I’ve sadly heard some not-so-good reviews of the new Ovations. Better setup as far as layout and turning (the Octagon turners sure left some things to be desired!) but I think temp fluctuations and humidity issues were the biggest complaints. Hopefully some others will chime in.