The backpack has large, heavily-padded straps that will reduce the strain on your back and shoulders even if you have to carry lots of stuff all day long.
You can adjust the straps of the bag to the desired height. An awesome feature is that you can roll up and hide the excess strap material so it doesn't just hang down.
The 25-year full warranty deal not only lets you get your backpack exchanged if anything happens but also serves as good evidence that the producer is very confident in its quality.
The top handle is at the very edge of the backpack; this seems like a minor issue, but if you use it to lift a loaded backpack it can hit your legs pretty hard.
The backpack has pockets for a camera with a zoom, 3-6 additional lenses, batteries, and flashes. There is even a compartment for a small tripod and two pockets for SD cards. For various personal items, there's a big pocket on the top.
You can change the layout of the backpack to fit everything perfectly. For example, you can remove and reposition the velcros dividers to free up space for a camera with a large zoom and still fit the other stuff, like lenses and filters, on the sides.
This backpack is great for light-duty service - if you need to carry some necessary equipment from home to work or a place of a photoshoot. The strap has soft padding that alleviates the pressure off your shoulders and back so you won't be tired by the end of the day.
If you plan to go on long trips with your backpack, the Lowepro Slingshot may not be the best option. Carrying a lot of weight for a long time on just one strap will put a lot of strain on your shoulder.
This is a decent entry-level backpack that will keep your equipment safe. Granted, there is nothing fancy about it, but it's very reliable nevertheless.
For those who take photos regularly and have a lot of different accessories that you need to carry around, this might not be the best choice. You will probably need a backpack that is bigger, has more customization possibilities on the inside, and has some protection against harsh weather.
The backpack has two heavily-padded straps that distribute weight evenly across the area of your back and shoulders. Even if you have to carry a full backpack for the whole day, you almost certainly won't get sore shoulders or a backache.
There are various pockets for the camera, lenses, batteries, memory cards, flashes, and other accessories. There is also a compartment for a small tripod.
The top handle has a tendency to tear if you try to lift a fully loaded backpack. It's a good idea to try to always lift it by the shoulder straps if you know it's heavy.
For those who have lots of gear this might not be the best option as a primary bag, as it is might be a bit smaller than what the photos make it look like. But, instead, it could be a great fit as a secondary bag, where you put your gear for specific occasions/shoots.
You can easily transform the Evecase into a general-use messenger bag by removing the inserts. It will easily hold some books, a laptop, a sweater or a jacket.
Carrying a lot of equipment all day long will be a challenge. If you often find yourself in such situations, you'd probably be better off getting a backpack with padded straps.
Unlike a backpack, this messenger bag doesn't have various compartments for lenses, flashes, and batteries. You will have to do with one or two lenses tops.
The fabric of the backpack is water-proof, so your equipment won't get wet in a heavy rain. For additional protection, the bag comes with a rain cover.
You attach the tripod to the bottom of the bag with the same straps that close the main compartment. So every time you need to take something out of the bag, you will have to remove the tripod.