Remineralization Cartridges: Thoughts?

[TripleT]

New to the forum here and was wondering if a person has an acidic water source that using one of these after the DI is viable?

Articles claim that the remineralization cartridge will bring Ph to around the 8.2 - 8.3 level. Also, if anyone uses one of these cartridges, what is the life span of it? ie:gallons of H2O before replacement.

Which brand/manufacturer would be best for our hobby?

Thanks