I've driven a race prepped Elise and yes it's like a gocart but it really isn't quick at all in a straight line.
The 0-60 is quick due to the light weight but from a roll they're not fast.
In fact as speeds rise they get worse.
I remembered staying with an original Elise up to over 100mph in my old Focus and at 120+ I started to walk away from him as they hit a wall at about 125 iirc.
However, as people *think* they're quick it's fun to correct them...
As for buying one, yuch! I thought they were horrible. Stripped out, noisy, 4 pot, *tiny*, no thanks. Plus maintenance is an issue, I heard teh body has to be removed to change the battery on the original ones at least. And being a (L)ots (O)f (T)rouble (U)sually (S)erious vehicle maintenance will be high on the list...