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Insulfrogs simplify wiring but may cause problems for some locomotives paritcularily if the frog is higher than the rail. It will lift the locomotive so it no longer makes contact. Steam locomotives are most suseptible to this. The cheap fix is file the frog until it is the same height as the ajoining rails. Metal insulfrogs can most often be wired as electrofied frogs. <br />Electrofied frogs provided more reliable operations as it eliminates the dead zone of the insulated frog. It needs to be wired so the polarity can be switched as required. <br />If you are jumping into the hobby past your ear lobes go with electrofied frogs. <br />If you are less serious then the insultated frogs may perform to satisfaction. <br />I use insulated frogs on my layout. I've filed the frogs and it works well for most applications. I've got one in the yard though that one of my Athearn F-7 has difficulty with at slow speed but I've not spent any time to diagnose yet.
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