The view is amazing. Local photographers were bringing their clients to the "next door" patio/roof top to take pictures from that spot so you know the view is as good as it gets.
The location between Fira and Oia worked great for us. Imerovigli itself is very small with only a few shops plus several restaurants (recommend Anogi). Its about 10 minute walk to Firostefani which is a little bigger and has some more good restaurants (we liked Onar best). Its about a 25 minute walk to Fira which is a bustling port with lots of shopping (that is where the cruise ships dock). Oia is about a two hour walk the other way (factoring in time for pics). The unit itself is clean and has what you need for a short stay. Nikos was there with Albert (the porter who will carry your luggage down the steps) to greet us when we got there.