The ponds as a whole is relatively safe, however, lyrebird is closer to the jail end and as such house prices arent as high as the other end of the ponds. Stanhope parkway is a very busy road so depending on which part of lyrebird crescent the house is on, you may have big issues with noise
lyrebird crescent is actually a good location as its located in the middle of Stanhope shopping, Ponds shopping and Schofields station. I used to live there and moved to other side of the Ponds i.e. near Schofields road. Driving to Castle hill, Blacktown or the city takes me more than 5-10 mins longer compared to my old place at Lyrebird crescent. Its a convenient location. All areas in the Ponds are good anyway. Its the only suburb I think to have soccer, cricket, tennis, swimming rugby facilities and have a thriving community which makes it very liveable.