With the big guns, the Konigsluther is just under 44' long in 1:48 scale, which puts it 10' longer than the Konigstiger, but with much bigger guns.
Not something to want to maneuver in small streets, but certainly something to reach out and touch enemy units with.
Based on stats and the fact that we play with alot of armor 2 infantry I'll probably keep it in the Sturmkonig configuration since rolling 10 dice against infantry Armor 2 with unlimited range is just too awesome, Advanced Reactive Fire and its damage of 7vsT.Armor 4 and 6vsT.Armor 6 is still pretty great since nothing can kill this in a single shot except a really lucky Fireball.
Despite their size the models are very light so there's no worrying about broken legs.