I did a lot of research before buying mine and they seem to stack up against some of the more expensive binoculars. I mounted mine on tripod and can read signs from like 1 km away with them.
I have the Leupold Acadia BX-2 in 8x42, bought 'em about a year ago but I think they're discontinued now. When I bought them I went into Cabelas to look at the Leupold Acadia BX2, Vortex Diamondbacks, and Nikon Prostaff 3 and 5. The prostaff 3s were ~$100 cheaper than the other two brands, and you could tell by looking though them, while the 5's were a 10x50 and larger than I wanted. The Vortex and Leupolds were close, but my eye liked the Leupolds more. Then I walked over to the bargain cave and they had the Leupolds in an open box for $100 off! - I had already picked the Leupolds, but was going to do some shopping before I returned to the optics counter to pick them up.
This is my second pair of Leupolds, my others being a pair of Yosemite bx1 10x30. Those ones are Porro prism not roof prism, but they are pretty compact and have really good glass for a $99 pair of binos (bought 50% off at Wholesale Sports a few years back). They are now my backup pair, and you can adjust the pupil distance really small on them so they work good for my kids and tiny wife which is a nice bonus.
As for the Vortex GlassPak, I don't really like it. Its what I've been using for the past two seasons, and it sure beats no bino harness but I feel like it has a design flaw. The lower straps connect to the harness at the very bottom corner, rather than part-way up the side, which causes the top of the glasspak to flop forward rather than sit parallel to my chest. That could just be me and the way I like my straps adjusted, but I'm not a fan. However, it was $30USD at Cabelas down south, and you're looking at $80USD+ for anything else so I'll live with them until I can afford a better replacement - they do their job, which is to protect my binos and keep a few extra things super handy (there are two side elastic pockets, and a little zippered compartment on the back, where I keep windicator, lens pen, a cleaning cloth, ear plugs on a string, my havalon w/ 2 extra blades, and a bit of TP), but they could be better.