The unit was as advertised and worked great for us. It is about one block to the beach and 6km to the small village of Coles Bay so you should have a hire car.
The only negative is that the wood in the frame surrounding the patio doors into the unit as well as the main window frame in the unit have both expanded due to humidity or moisture thus making them somewhat difficult to operate.
As to wifi just give it up outside of Tasmania's two large cities. Like many on holiday we went to Port Arthur, Coles Bay, Cradle Mountain, and Strahan - no real luck in any of those. Instead, be prepared to use your carriers 4G data capability. Telstra had the broadest coverage and an excellent 28 day holiday plan with their local SIM cards.