I love Online Labels and use a variety to make my Bridal to/go emergency kits personalized with my company logo and to identify separate products in my mini bundle kit.
This gives me a chance to make ordinary business give outs EXTRAORDINARY with personal touches of my brand logo and various identifiable products within our give outs.
Printing labels myself is wonderful however a great tip is to make sure your printer settings are correct so your design lines up perfectly. Sometimes a PDF or other print prompted document will automatically stretch your graphics to "fit the page." If you are having trouble with alignment, start there.