We have them in stock and have installed a number of them in smart cars. They are good springs and in my own opinion (personal opinion) they fall in between the Eibachs and the Smart Madness springs we offer. Here is the order we rate them from best to worst:
Smart Madness
B&G
Eibach
Some will say that we rate our first because they are ours. That's not the case, we had ours done to our specs (after not being satisfied with what was available) in Germany to TUV standards (TUV) approved and their ride and handling is a bit better than the others.
If you are on a budget, the B&G's are better than Eibachs, if you can spend a bit more we suggest our own brand (have them on both of our cars). If you have any questions please feel free to give us a call at 562-961-6800.
There are a number of people on this board that have purchased all the above and maybe they will chime in and give some feedback.