I wear mine horizontally. Vertically is too long when you sit down and makes it awkward to grab at depending on the holster. Mine is from Platinum Series bought at Best Buy. Had the same one for my HTC One X and loved it. Latch is spring loaded so it is secure when it's holding the phone and easy to release/snap back into. Take a look into it, it's only about $40 for the case and holster combo.
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Bell HTC One M7_UL
S-OFF, SuperCID, Root
Samsung Galaxy Tab 2 10.1
Ripper ROM V3
s720 "Libra" - Windows Phone 6.1 (LOL)
A6262 "Hero" - S-OFF, Root, SIM-Unlocked
Vision "Desire Z" - S-OFF, Root, SIM-Unlocked
Evita "One X" - S-Off, Root, SIM/Bootloader-Unlocked
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