I forgot about the Alexander! I have seen that set up really well for a dwarf hamster, with the shelves turned into a full level (otherwise the height is an issue). I did like the big front door on the Savic Mickey 2XL for a robo though. Even though our robo was never easily handleable, I could open the door and he'd come forwards and sit and talk to me
No bars etc. If I put my hand in he'd run away though. Also when you're spot cleaning your hand is on the same level as them and not coming from above - just seemed easier.
I can imagine the maxi duna is similarly easy though as it's so long and not too tall so it's not quite like a hand coming from above - more at an angle.