Spacious apartment spread out on 2 levels on the 2nd floor of a modern apartment block. Walking distance to all the main sights and very easy to get a taxi outside the apartment as it's located on quite a busy street. We found the apartment clean and well cared for. We did find the apartment a little noisy mainly from the upstairs apartment early morning and very late at night - if you're a light sleeper take ear plugs.
There were a few basic amenities lacking - I asked about a tea towel for the kitchen and was told these aren't provided for hygiene reasons. Also, there was no duvet cover on the double bed, just a sheet, a thin duvet inner and a bed throw - I thought this was particularly unhygenic, easily fixed though. PIllow cases for the spare pillows in the wardrobe would be appreciated too as some people like 2 pillows.
If you're 4 guests and you wish to use the 3rd bedroom do mention this to the owner. I'd booked a 3 bedroom apartment because our children sleep better in separate rooms, but on arrival the 3rd bedroom wasn't made up - we ended up moving a set of bed linen across ourselves..
We really enjoyed our 4 nights in Valencia with our children, there's easily enough to do to fill a few days.