Most buildings would provide lock-out service, for example, but you need to find out if that's immediately available, and if there's a charge for that. And remember that many renters happily forgo services and amenities because those extras would be out of place in the smaller, vintage buildings they prefer. It's a tradeoff. For many renters, this is the single most important consideration. All these questions should be carefully considered.
Many observers believe location is a more crucial factor in the city than in the suburbs.
Location is much more important in the city, and so is the view. Parking is a huge consideration for many car-owning renters. In most suburban properties, parking is free and easy. Not so downtown. Check out the availability of parking both during the day and at night.