Whatever tool you find easy to use is the one I'd recommend. The easier it is to use, the more you'll use it.
That said, like some others, I struggle to trust electronic measuring tools over years of use. Personally, to combat this concern I own a Tropic Marin High Precision Hydrometer I use to validate my electronic salinity tester every so often. Thus far, my electronic tester hasn't drifted on me as confirmed by the glass hydrometer but nonetheless, its reassuring to be able to confirm this in as much as may be reasonable for a hobbyist to do.
To answer your question directly, I don't use Milwaulkee (for no particular reason) but I do use an electronic salinity tester. It's just faster and easier for me to do many times over when mixing new salt water mostly. To me its worth it. If the Milwaulkee unit looks appealing to you, I'd say its a fine choice to buy.
That said, like some others, I struggle to trust electronic measuring tools over years of use. Personally, to combat this concern I own a Tropic Marin High Precision Hydrometer I use to validate my electronic salinity tester every so often. Thus far, my electronic tester hasn't drifted on me as confirmed by the glass hydrometer but nonetheless, its reassuring to be able to confirm this in as much as may be reasonable for a hobbyist to do.
To answer your question directly, I don't use Milwaulkee (for no particular reason) but I do use an electronic salinity tester. It's just faster and easier for me to do many times over when mixing new salt water mostly. To me its worth it. If the Milwaulkee unit looks appealing to you, I'd say its a fine choice to buy.