Rather delayed feedback but here’s my 2c on the Mantis.
I have now used it a couple of times in a live setting and all the time in the studio.
In short, it’s a revolution compared to my Heath Robinson DIY jobs (I am deeply remedial at DIY I understand others are different).
I enjoy the angulation options and the ergonomics of using it. This is my 1st 104hp as opposed to 84 and the extra space is vital for my current live setup.
Fitting modules is a bit of a pain. Some modules seem not to want to fit between the rails without a bit of cajoling and it’s pretty shallow but I guess that helps with the portability and a light weight. I have had a similar experience in terms of the hight of modules with other cases too so this was no great disaster for me.
Power wise the case seems to manage my power hungry digital selection quite happily. According to modular grid I’m using about half the available power of the Zeus Tiptop setup.
In terms of portability it’s brilliant. Revelatory in terms of weight. I have the Decksaver and use the newer Trans Mantis Express bag and it’s lighter than my daily work bag (containing laptop and lunch) to get to the gigs. I can take it patches using stackables and right angled tendril cables as well as some standard cables.
Obviously the case is plastic so probably not as environmentally friendly as some other options. Also, it is not bombproof compared to some other builds so you’d not want to check it in at the airport, but has hand luggage I don’t think it would be an issue.
Overall, for the money I think it’s pretty unbeatable.