If one worries about resale, the factory s/u is usable in all US states; others are not, esp in CA.
Chips such as Torque 200:
In 2006, I got a (non-BOE) chip for Elise. PES not in that business now.
The most salient benefit was the elimination of the large valley before cam changeover. (IIRC, a ~20 hp gain at that point, but not at other rpms.)
It was quicker in my testing: 3500 rpm to redline, same road and gas level; 1 second quicker. Pretty good.
2 yrs ago, got the BOE 300. No other changes, e.g. stock exhaust, but BOE uses their foam air cleaner.
The thing to remember about superchargers is the instant torque they deliver, down low.
This, a pleasure and easier to drive.
BOE shows the TQ200 @180 hp/136 tq (which may mean the hp at crank is ~212)
That is better than my old chip, but that tq is still pretty anemic and, worse, peaks at 6900 rpm.
Even the Exige S managed 159 tq (@ crank, ~187?) at a reasonably low 5500 rpm.
I cannot accept that 2 equal cars will perform the same using TQ200 vs factory supercharger.
I've said before that butt dynos are of no use to us. Try clocking your car before/after mods. I chose 3rd gear because it was long enough to minimize tiny timing errors and didn't want to introduce errors by incorporating any shifts.
I will post my new time (same road) soon.