Not sure there were any negatives. Maybe the WiFi could have provided better speed - but that had minimal if any impact on us, we were out most of the time, and when we were there it served the basic purpose (looking up tourist locations etc).
The location was excellent. Not to long a walk to get down to the centre of the action; lots of restaurants around; on the same road as La Pedrera; just around the corner from an Open Top Hop On, Hop Off bus stop (big plus for us); 24 hour small supermarket just downstairs (which we used often).
My eldest and I (once the young ones were in bed) spent many a night just standing on the balcony, watching the world go by, the taxi's, cyclists and people - great fun.
Yes there is some street noise, but nothing more than any normal city. We didn't notice it too much during the day, and not at all during the night (balcony doors closed, air con on - as it was hot when we were there).
2 Bedrooms in the flat we stayed in, 2 adults in one, 3 kids in the other. Plenty of space for what we needed. Lounge was a good size, with TV and Radio (though we barely used them).
Laundry with washing machine (we used), Kitchen with everything we needed to prepare meals, clean up etc.
The price was great for the location, and the facilities. Glad we didn't look for cheaper.
Amazingly friendly, and helpful - though we only dealt with them prior to, and upon, arrival (as we had no reason to contact once there, no problems etc).
Highly recommend Claris Apartments. Thank You !