I decided to give Sarah's a try to check out the vegan options. What impressed me about this cafe was not so much the food but the service. The cafe was close to full and there was only one amazing staff member taking orders, taking the food and drinks to the table, and making the coffee. People had to wait quite a while but the whole time he made sure that you felt noticed and acknowledged. His service was amazing and I could not see that there was anyone who was annoyed about the wait to order. Once the order was taken, the food arrived quite quickly so the kitchen was obviously well staffed and organised. 
The cafe itself is set at the front of a plant nursery which makes a very pleasant backdrop to what is quite a small space yet seating potentially about 35 people. Despite this, it was not at all noisy and although a little hot, there were cafe blinds that, if open, would have let in the air. The decor is unusual and there is a canopy rather like a big circus top hung with retro items. Art work displayed on the walls added to the quirky/retro ambiance.
The spinach and cheese crepe with lemon and herb sauce was like a good quality home-cooked meal. It arrived hot and stayed that way, and was tasty and enjoyable to eat. The iced coffee was made with almond milk (which I requested) and was a standard style with ice-cream added.
Summary: service on the day I was there was exceptional considering the fact that they seemed to be short-staffed. Parking is easy along Semaphore Road and parking close to the beach and then walking a few blocks up to the cafe gives you the chance to explore the other businesses along Semaphore Road. Menu is limited to a few choices but what is there is good. The dishes that other customers were eating looked well presented as was mine. This cafe is not about artisan, hipster food - more about healthy home-style options. Worth a try? Yes - I would go again even if just to experience another menu option.