As warned it's in the middle of the red light district, and while conveniently close to the station it's a little walk to get to sightseeing areas or places more pleasant to just wander in. The hostel itself was really great, very clean with solid wifi and the best free breakfast ever. The staff are super helpful.
No lockers and doors don't autolock, so you're dependent on roommates remembering - no check at main entrance either. Staff were lovely, wifi worked on every floor, and once the renovations are complete there's going to be a mean set of showers and toilets. With renovations in progress, there aren't so many toilets/showers, and if you want to use the wifi in your room you get sawing noises. If you want to use the wifi in the common room, better hope you like their loud music choice.
I would go back to Heidelberg just to be at this hostel again. It is the absolute best I've encountered in over a month travelling. Great facilities, solid wifi, spacious rooms which feel relaxing, great kitchen, free bike rental, free towels... And little touches making hostellers feel human like hand soap and hand towels complete it. Stay here! It's so nice. Location nice when getting your luggage settled, an above a supermarket - though a wee walk away from town center and sights.
Some of the staff tried to be nice and the showers were good. Wifi only worked in lobby, where you were chased out for eating your own food. Place felt very soul-less, hostelers expected to walk on tiptoe in hotel environment. Anywhere other than Switzerland the price would be terrible value.
Staff are lovely, building is well eqipped (except perhaps in terms of person to toilet ratio). The large dorms, as one might expect, aren't particularly restful (dependent on your roommates).
A very nice room in one of the Cinque Terre villages, easy to get to great food and surrounded by good views (the whole town is). Room was really a small apartment complete with kitchen and bathroom, very spacious for a hostel and mostly not bunks. Barely saw staff. No wifi in room and reception (and wifi) shut at 7.30pm. No lockers, but only people with key to your room could get your stuff. Would stay there again.
The location was great, the wi-fi worked, and the staff were friendly when they weren't screaming in Italian on their personal telephones. But the showers never exceeded luke-warm, the room has a terrible and unknown smell, my matress has a fist-sized hole right through it, and I felt a bit afraid to touch anything. The hallways echoed terribly, so the partying people next door at 4 am sounded like they were screaming in my ear. And the lockers were far too small for my backpack.