Bundles in general are a good deal only if you're not winding up with stuff you wouldn't have bought in the first place. It's rare to find bundles that aren't stuffed with very, very cheap accessories, but if you find one that's really got only items you want and is available at a discount vs. buying items individually, that's great.
In the specific case you referenced, then, I think we can shoot down this bundle pretty quickly just by looking at the included lenses. Given that you're starting with a Canon 70D body, which is a pretty nice place to start, there are a couple of lens-buying strategies that make sense: (1) start with a kit lens until you learn enough about photography to know what lenses you really want, or (2) start buying lenses that you're going to keep for a while. The lenses included in this kit fail both of these strategies:
- The 18-55 kit lens is a fine kit lens if you're learning. It's well-matched for Canon's entry-level "Rebel" cameras, but it would be a great way for you to learn the ropes, and contrary to some schools of thought, if you're using it to learn, I think there's nothing wrong with a kit lens for that purpose.
- The Canon 75-300 lens is a poor choice for the 70D -- the 55-250 is generally considered superior to this lens.
- Hey, look -- they included the 55-250, too! This is a better choice for the 70D, but you're actually quite likely to wind up swapping this out for a higher-quality piece of glass pretty quickly, too. The really baffling question, though, is why they'd include both the 75-300 and the 55-25, since their focal length range significantly overlaps.
- The 18-135 lens is a decent lens, but it's typically considered a kit lens alternative vs. the 18-55. In other words, when buying a kit, you'd normally expect to find one or the other of these, but probably not both (again, there's a large overlap in range). The 18-135, unlike the 18-55, sometimes finds a long-term home in photographer's kits as a "walkaround" lens since it's got a fairly versatile range.
- Canon's 50mm f/1.8 is actually a pretty good kit inclusion, as it's inexpensive, fast (optically), sharp (especially stopped down a bit) and light. It's got entry-level build quality, but it's a great way to experience prime lenses.
- They're counting the 58mm wide-angle and 2x telephoto bits as "lenses", but that's really a bit of a misnomer. Both of these are really bits of optics that work only with one of the other lenses in this kit, and they're not going to perform at the level that a dedicated lens can. It's pretty common to see these counted as "lenses" in kits, which is fairly unfortunate, in my opinion.
Some of the other parts of this particular kit are equally suspect, including the tripod, which looks like a particularly bad choice.
Bottom line: run -- don't walk -- to the next option.