Hello I'm considering a 2008 Roadster having just cancelled my Model S reservation. I do have a few questions and I apologize if it been covered before. I tried to read as many threads as I could before posting. Is the Roadster a lemon? I know the word lemon is really harsh. But I was reading the thread on "List the issues you had ..." and it seems the common theme is TPMS and PEM and some other elements critical to the operability of the car. I understand this forum is just a very small sample size but at 2400 cars out there, the small sample size of respondents just might be representative of the real world. a)What's a PEM? And are all early production cars all destined to have PEM fail sooner or later? I read somewhere people upgraded the PEM, is that a warranty thing or a personal thing? at $12k to replace/repair, seems like really touchy subject once warranty goes out. I'm coming from a SL500 camp and I can tell you, the consensus is the ABC Suspension and the Vario Roof will likely fail sooner or later. b)The TPMS that's failing. Are they replacing it with the same stuff or has Tesla found a better replacement so it won't fail every other month? c)Battery. Some threads noted every time they go into the service center, they see someone's Roadster having the battery swapped. That's a scary proposition. You guys terrified? d)Extended warranty. I think I've only read it was briefly mentioned on an announcement very very soon. Is this a must? Given this is the first car Tesla ever produced and there's bound to be tons of bugs to be worked out. It seems just everyone loves their Roadster here, but how do you feel about its reliability going forward? Thanks.