Rather than just deriding someone, you could of course offer them a way to improve, by suggesting that it should be 'and solidly engineered', or 'engineered solidly'.
The whole sentence / tag line could probably do with improving, but maybe this is not a native speaker, making derision all the more unacceptable.
The whole sentence / tag line could probably do with improving, but maybe this is not a native speaker, making derision all the more unacceptable.