OP, I can only comment on the SC I have - the ESS VT-1 535.
1. I have had it for 14,000 miles or about 18 months.
2. It is not my daily driver.
3. I have had it on the track for a total of 16 days. The hottest at Summit Point Main last July where the ambient air temperatue was 104 degrees. Surprisingly, no issues.
4. I have no complaints with the SC. It performs flawlessly in hot or cold weather.
5. I believe the ESS VT-1 is good value.
6. The difference between stock M3 and SC'd M3 is significant.
7. I purchased from and had my SC installed by iND in Palatine, IL.
8. I am very pleased with my purchase.
I wish you well in your research. This Forum is filled with numerous posts on the various Superchargers available. While I am biased toward ESS, I am sure the other Superchargers available have their good points as well.
Good Luck!
Chris
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ESS VT-1 550 | M24 Oil Cooler | Fall Line Half Cage | RaceTech 4009W | 6 pt Harness | Lifeline Zero 360 Fire Suppression | Rear Seat Delete | Motion Control DA Dampers w/remote reservoirs | 900/650 Hyperco Springs | RD Sport Sway Bars | Brembo 380 BBK | GC Camber Plates | Hoosier R7 | Eisenmann Sport | Stack Gauges | Painted Challenge Front Lip | Painted ZCP Rear Spoiler | Xpel Ultimate Film | LuxAngelEyes
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