Great big ole bag full of NOPE from this bubblehead.
Then you'd love this quote from their website:
Rely on maximum safety thanks to the modern acrylic pressure hull design offering incomparable deck spaces.
ACRYLIC....MODERN?
What...in...the...name...of...all...that...is...holy.
Who is going to trust their lives to a 400ft long plastic tube at several hundred feet down? I mean, a small research sphere...sure...but a damn full size sub?
I think I'll stick with HY-80 thank you...