So, it seems that Tesla's "swap" service is quite different from the way Better Place does it, which is to give the driver a fully-charged pack in a hurry whenever needed. While Tesla's method does eliminate one of the negatives of battery swapping with a pack that you purchased (again, unlike Better Place), it does raise a few questions. How long will swap stations hold the pack for owners, if say, they were going on a long road trip? How many packs will each store have on hand? What type of costs are we talking about for a swap and storage of the pack? With every bit of new information come many more questions.
When people take an occasional two-way long distance trip, they'll get a replacement pack and then pick up their original one on the way back. The issue of giving up your one-year old pack for a three-year old one goes away.
[Source: Plugin Cars]