Review of Salzburg Yoho Hostel:

Location: 5
Staff: 4
Comfort Level: 5
Amenities: 4 1/2
Fellow Hostelers: 5

Overall: 5

This is one of the "Europe's Famous Hostels" group, and for good reason. Clean, well located and with generally decent prices for rooms it suits most every need. I give it a 5 for the showers alone, though if you try to shower early in the morning you'll run into the age old problem of never enough showers. So we shower at night or the afternoon when no one is around. The womens showers were renovated a few weeks before we got there, and let me tell you they are probably the BEST showers we've seen traveling. Ever.
The amenities gets a hit because the guest kitchen is a joke, open from 11am to 5pm and so tiny you can't turn around comfortably it makes a mockery of the word "kitchenette." If you're a hardcore self-feeder and don't want to spend 3-8 euro on breakfast and dinner respectively then you might rethink this one. However, the free wifi is actually free and accessible all hours on all floors. You have to pay for computer time if you don't have a laptop or mobile device, though, so be warned.
Everything, as with most European hostels, costs. Everything. There was even graffiti about that downstairs in the basement/laundry room, which was hilarious. There were years of graffiti on the walls from all corners of the world in many languages (though Australians are the most obnoxious of the ones we found). We added our marks as well, continuing a great tradition. We ought to buy sharpies to graffiti with, though, we busted two ballpoints writing on the wall.
The laundry costs 2 euro for the small washer and 2 euro for the dryer, so we had to halve our respective loads to fit three people's stuff into the wash. But they smells wonderful after the wash :) You put down a 5 euro deposit for linen, which you get back if you check out on time (10 am), and the same for a towel if you need one, though you pay them an nonrefundable .50 cent to use it.
The bar downstairs boasts cheap drinks, but there are so many beer gartens and restaurants around with better deal and drinks, according to what we saw and the input from the hostelers we talked to.
The beds were classic bunks that squeaked and shook with every movement, and the mattresses were original 70's we think, but they just got new mattresses the night before we left, and they're doing more renovations so they might get new beds too. Crap pillows, and the sheets were two heavily starched flat sheets.
The security lockers and door security were really pretty good though, you had to have the keycard to your bed number to open the corresponding locker. The only thing to remember was that the lockers didn't lock on their own and if you don't lock it manually before you leave, your "security" is compromised. We had no issues, nor had we heard of anyone having issues, but it's a good thing to note. Luggage drop is just the open downstairs area where bags can be piled for a morning; we brought a cable lock long enough to fit through all three bag handles and locked it around a bar in the staircase, just to be safe.

I would say that for a long stay, this is a great place but for the kitchen, for a one night stay it would be just about perfect.