It's bigger (but not on the inside)
921368
When this came in I was kind of shocked to see just how big this thing was.  Regardless, it looks good on my car.  I would have preferred this to be an inside window sticker but it works as is.
3720575
I thought it  was bigger  also it wasn't in my opinion  a lunch  bag
871430
This thing. Was way bigger. Than I thought it was. I thought it was going to be a lot smaller. I'm glad it's bigger, but damn, what a huge upgrade from my previous one.
1720964
Wish it was a bigger size - picture makes it appear larger
1749400
Pros: good pet/owner visibility; Sturdy; adequate storage options, easy access to pet from different ends and a "comfort" access on the side to slide a hand in to comfort your pet.

Cons: Not as large as I expected.  The advertised dimensions are external.  The inside space is about 8 inches wide by 19 inches long, by 12 inches high at the peak of the arched top, but only about 8 inches high at the "shoulder" of the roof.  That's a long skinny space.

We are travelling with our 9 lb. Maltese puppy this summer, flying on Delta.  We have a&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Original-Deluxe-Sherpa-Carrier-Medium/dp/B001CQAB8C/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Original Deluxe Sherpa Carrier (Medium)</a>&nbsp;which I've been using to train Cody to be comfortable travelling in a confined space.  I was hoping the Bergan would be a bit larger with better visibility so that he can see me when he's at my feet.

Cody has adjusted to the Sherpa bag and will go in, turn around, and settle on command. He's not thrilled, but he doesn't fuss as long as I'm near.  Inside he has about 10"x10"x17" of space.  He can stand with his head stooped, and turn around.  He can lie down and curl up next to me.  It's snug, but I can tell he's not uncomfortable.

When I gave the command to enter the Bergan, he hesitated.  It was new, so I expected that.  When he did go in, he had difficulty getting himself turned around, and I could see that he was crowded at the shoulder. There wasn't room to lie down without being scrunched sideways, and there was an excess of room lengthways.  The narrowness of the interior space was compounded when using the shoulder strap.  Even without his weight to pull the bag down, the straps narrowed the sides of the bag as they pulled.  In contrast, the Sherpa has a rigid frame at both ends that help to hold the shape and space of the bag while carrying.  The included pad with the Bergan also seems fixed to the bottom plate and takes up about 1" of vertical space, making the height even lower. I had him exit immediately and determined to return it.  There's just not enough room for a 9 lb Maltese.

To be fair, Cody was only in the bag for about 15 seconds, just long enough to see that there was no way for him to get comfortable inside.  So my review is all about space.  Others may have a more educated opinion about the long-term use of this item.  However, I would suggest that, if you have the money and the pet's physical comfort is a high priority, get the Sherpa.  If you need a sturdy bag at a bargain price, or it's most important for your pet to be able to see you, try the Bergan.

Cody will be riding in the Sherpa.  If I need to comfort him, I'll slip my hand in the top flap.  If he needs to see me, I'll turn the bag.  At least I'll know he's as comfortable as possible in the Airline allotted space.
3372086
A bit smaller than I expected, but it's doing the job for now
4099271
It seems a lot bigger than what it actually is. I would have liked it to be bigger. I don't remember if there were measurements listed so it might just be my mistake but they are fine nonetheless
2020382
Though I like it and it does look pretty.  It is bigger than the dimensions included in the website.
4371936
It's really good, but it's bigger than it looks! Probably 8 inches. Thought it was gonna be stealth. Definitely not stealth. But it works well.
987668
it's really big an bulky not really what I was looking for.
2748895
It's larger than it looks in the picture, once it's fully unfolded. I was able to fit several things in it, and the velcro held tight.
1958327
This is really convenient but a little bigger than I expected
2081477
It is a lot bigger that it looks.  Hard to tell if the power is actually on (I missed a sequence because the power was not actually on).
3793500
OMG its so big.......on the inside. Great product.
2819148
It's cute but I don't know what is going to fit inside of it.
2555557
Bigger than I expected, but still quite cool.
914528
It's big.  Could be a negative for some people (including me), but it works, can't compain.