Can you compare how they perform compared with the standard springs please?
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What do you think you are gaining? This does not "retain the soft standard springs". The air bags add spring rate. As much or more than you would get from heavier springs. If you want a lift with the same spring rate, get spacers for the spring supports.
The only reason for airbags is so that you can adjust as the load changes. The front does not change.
Airbags might bring it back to standard height. But I won't bother.