Tried a few times to print one these neat-looking models (rotating turret version, Orion Delta). All failed. :-(
The rafting structure hard-coded into the STL model didn't result in a smooth curved hull below, but only a barely horizontally-adhering bunch of strands.
One of the spherical turret bases failed to adhere too, which put all higher layer plastic on air -- or rather, left on the nozzle or nearby. One such blob of unplaceable plastic landed on the deck, which delaminated the next deck level, so the model was unsalvageable.
Haven't tried the fixed-turret version yet, but the hull-shaping problem makes me pessimistic.