I've found my Luna Pro F to be a very good tool. The only area I think it lacks is when used as an incident meter in street photography, or similar situations where you want to be rather inconspicuous; in which case you have to hold it in front of you and point it back at yourself (the incident dome is on the front end of the housing, rather than the top surface where the controls and readout are at); whereas with meters like the Sekonic, with the white dome on the upper surface of the meter, all you have to do is hold up the meter in front of you and take a reading; just a bit less conspicuous. Check out the documentary "War Photographer" to see what I mean.

~Joe