Makes the phone a bit fatter but...
580602
Battery life is phenomenal! Back case fits and click in very nicely and doesn't really make any noises when squeezing the device.
3504333
the case looks awesome and does add a bit of protection. It does however add a bit of thickness to the phone which can take some getting used to.
677822
Makes the phone really big, but does give it really great protection.
2743830
It's doesn't fit the most flush, but i still really like how it has performed for my phone, especially with two kids that like to handle it often. :)
753312
The case feels very protective and yes that is why I purchased the case, but it also added a lot of bulk to my phone. So I am torn between having this case or another that doesn't add as much bulk.
617780
Makes the phone a little bulkier but it's protected my 6s plus during multiple falls!
2752005
Good product, except it causes the case to slightly bulge which wouldn't be a problem except the case had to be slightly modified to accommodate this.
2976461
I like it.  Adds a little thickness to the phone,  but I think the phone is too thin anyways.
4386901
A little too thick and heavy, but the power cover's benefit of substantially increasing battery life is well worth it
326167
I like this case more than I thought I would. My only complaint is that it adds more weight to the device than I'd like.
825866
the only detraction from this case is that in making the whole phone unit thicker; it seems to cause my to "pocket dial" more easily, so requires some attention to turning off the screen when I pocket it! Otherwise, I am slowly abandoning the need for the 'rest' of my typical over-stuffed wallet!
2377578
Fantastic case, although it makes the phone a tad bulky and adds quite a bit of weight to the phone. Only 4 stars because the screws that hold the case together keep coming loose and falling out. Lost 3 screws since I started using the case last month. Other than that, highly recommended if you don't mind the extra bulk it'll add to your phone.
2745433
really loved it , gives the phone good support from falls
cons:
a little bit heavy and make the phone big
3670051
It's a little heavy and with the additional weight of my LG G4, it was too heavy and broke one of the air vent slits.  Also, the part that slides in over the vent flap thingie could be wider making it more stable. Not a total loss, I was able to repurpose it and make an iPod holder out of it.  The magnet strength is marginal too.
2323037
I have had this case on my phone for 4 months now. I've dropped my phone a few times and the rubber edges definitely made a difference.  No damage. The case does make the phone extra large... Yeah, even larger than it already is. It makes it difficult to fit in pockets, but the protection is worth it
4430627
It's cool. But its big as heck. I started using it without that hard case cus it was so heavy. Works well without the hard case but its still too freaking big. Phone is big as it is,  this thing makes it bigger.
2827718
For me the case added too much bulk to the phone and after a week I discarded it. It added enough width that I could no longer use the phone with one hand. One man's bulky is another man's svelte though so you may think differently. While the rubber contact surfaces are kept to a minimum and fit nicely in the hand I still found them to create an annoying amount of resistance when pulling the phone out of my pocket. Like at least one other reviewer I discovered the rubber inner piece moves around just enough at the top right hand corner of the phone to always appear slightly out of place. This is due to the way that the headphone cover is molded and the resultant thinness of the piece of rubber that extends over the screen at that point. As the other reviewer wrote it can be  minimized by careful manipulation of the flexible, attached headphone jack cover through the hard plastic case during installation. Still it was enough to annoy this engineer. I did not bother using the included screen since I already had one installed on the phone.

All that being said, based on the feel of the case and the installation of the phone in it, I have no doubts that it would protect the phone should it fall and land squarely on one of its corners.for a screen ruining crack.