Although I do not own a Tesla, I am seriously considering buying one. I twice drove the car.
Pros: In addition to the no-gas/oil appeal and the comments that were mentioned, I consider a major pro the ability to get a While Carpool sticker (not applicable to everyone of course). I live in California and have driven a Prius with a Yellow sticker that allows me to have solo carpool access, something I am now used to. It saves me a lot of time, and the Yellow sticker program expires at the end of June, meaning that then, all Yellow sticker cars (like mine) will be booted back into traffic. However, White sticker cars that use no gas, such as the Tesla, will be allowed until at least 2015.
Cons: In addition to those mentioned, like difficulty getting in and out and limited interior/trunk storage space, I find it unfortunate that the speedometer is blocked by the top of the steering wheel. Since the seats and steering wheel really do not adjust (other than to move too far forward) or tilt, that leaves looking at the smaller middle screen. However, I like being able to clearly see my speed while looking forward. Actually, although I like the look of the Tesla dash, I really became used to the large digital nicely lit display on my Prius. If I am going to get a ticket, I would prefer that it be because I was intentionally speeding rather than just not knowing I was going too fast LOL. Another con to me is the lack of a good cup holder. I understand that others find a way to tilt the cup when inserting it and make it work etc. However, I like having a fixed standard cup holder as I drink coffee on the way to work each morning.