We really enjoyed our few days here on Venice beach.
First of all the location - the listing is telling the truth, it really is just 40 steps to the footpath and the beach. We found it a pleasant, family safe, quieter part of Venice beach. A short walk north takes you to the more eclectic Muscle Beach and skatepark, while heading south towards Venice Fishing Pier will take you to some great places to each along Washington Boulevard. There are some small convenience stores there too for basic provisions - no car needed, although we had one and took advantage of it to do a larger shop at the Marina Del Rey branch of Ralph's.
The apartment had 2 adult size bikes, and we rented two more at the facilities on the beach close by. Santa Monica pier was a fairly easy cycle journey, and we could lock our bikes and explore Santa Monica itself easily.
In terms of accommodation, there were four of us. The rooms are semi open plan which was fine for us, although if sound proofing is critical might be more tricky. Our teenage boy and girl took a bedroom each while we used the double sofa bed in the living room. This an electric pump inflated air mattress which has the potential to be incredibly comfortable but unfortunately had a leak when we were there. However our host was INCREDIBLY responsive and very quickly found us an alternative mattress.
The apartment itself is well kitted out, the kitchen, living, bathroom and furnishings are all very high quality and there are laundry facilities should you need them. Internet was problematic for us during our stay which might be a temporary issue - worth checking if it is essential for you.
We were glad to be able to take advantage of some of the other bonus facilities offered by the apartment including the beach equipment (body boarding every morning was great fun, and the beach chairs, buckets and spades were good additions) and the rooftop grill where we enjoyed a delightful meal at sunset by an incredible chef (me).
Overall a fantastic stay, a wonderful place to chill out after 3 intense days at Disney, all made possible by great communications from our host and a lovely place to stay.