i also have a 30x loupe and the radio shack jobby as well.. i really prefer the radio shack one, although it takes a lil getting used to using as any lil hand shake makes it all but impossible to see out of it.. once you get down how to use it well, they really do outshine a 30x loupe handsdown.. they are the best tool i have found thus far for checking out the trics and getting a good feel for when your plants are ready to harvest..