I now understand why people don't like this mold for Ultra Magnus, though.
Thing is, I like Kingdom UM too. Like... Commander UM is a pass for me because I'm happy with the Kingdom version. It seems like everyone wants something different for Magnus. For some people he has to be a functional car carrier. For others he needs to have the inner robot and the armour. Others have their preferences re: shades of red and blue, or visor vs no visor, etc...
And between Siege, Kingdom, the new Commander class version, and even SG... people have options. For me, what I want out of UM is provided by the Kingdom version. So I'm saving some cash there.
I think the Nova Prime toy is pretty neat in robot mode (I have no strong affinity for Cybertron Prime so it doesn't bother me that they look similar)
The Cybertron Prime design always kinda bugged me because he has faux chest windows, despite having his real vehicle windows on his shoulders. So he's got duplicates that are clearly visible in robot mode. The Siege remould of the UM mould made it worse because the truck's front windows are JUST visible under the armour, and he has fake shoulder windows to mimic the original toy. So he's got three sets of front truck windows visible in super robot mode, and that always makes the back of my brain itch
Nova avoids that because neither his chest piece or his shoulder pieces attempt to mimic front cab windows.