Nice little case.
Works as youd expect, good quality.
Useful shaping, it does sit down the seat tube a bit if your tucking it in at the seats rear, but thats your option.
Light attachement not so useful as theres no real support behind it (light hangs and points downwards) id love to see a version with lights built in.. So im doing that lol
I had to do my usual mod and melt a couple of holes in the top with a screwdriver so i could attach it with a big cable tie, as it slips about a bit with just the strap. But thats normal for this design not a quality issue.

But yeah, modern take on a classic design and im pretty happy with it.

Very stylish looking bag, has a nice zipper does not rattle around and at a very good price. ðŸ‘ðŸ‘ðŸ‘ðŸ‘ðŸ‘
Dimensions: 8.0 in L x 4.2 in W x 4.0 in H. Capacity: 1.2 L. Weight: 4.8 oz.
I am using the large BV Bicycle Y-Series bag on a 1995 Trek 750 hybrid bike with a Serfas Full Spring Suspension saddle.
If you need a larger bag take a look at this one it is expandable to 1.5 L and has a key clip on the inside of the lid
BV Bicycle Strap-On Saddle/Seat Bag, Large, Black

The rear light mount is angled downward at a angle a little to much and you have to have a good bright light to be seen well,
I am using a Planet Bike Grateful Red Bike Tail Light, Red/Black

Iphone 6 plus and or 7 plus will fit, as well as the Samsung note 3 or 5, S7 edge or if you're like me your 6 inch by 3 inch prepaid Tracfone will fit.
I am using the large BV bicycle bag on a 1995 Trek 750 Hybrid with a Serfas Full Suspension Hybrid Bicycle Saddle.
More information in my comment section.

Thanks for taking the time to read my review...
Campjeep

This item is as expected. It fit on my bike well and attached to the seat pretty easily. It also worked well with the Blitzu USB led lights I purchased. I was able to fit 2 tubes, tube removal tool, utility tool, 3 CO2 cartridges and the CO2 inflator in the Large strap on bag option I purchased. I have not rode with it yet but will be tomorrow.

I got the Large size (after reading other reviews). It's plenty large (it actually extends beyond my Trek Domane's seat by about 1.5". It's a good size all and all. Build quality is good to very good. The door is zippered with a nice zipper and has a mesh/net pounch (for a few folded up $20 bills, etc). Some wrote a review that claims the flap opens upward (it DOES NOT) and therefore dumps everything on the ground. That person mounted the bag UPSIDE DOWN. It mounts like every other seat bag on planet Earth (the exact opposite as the photos from that review imply). My is mounted well and doesn't make any noise or do anything that any other seat bag I've had ever did. I'm very happy with my purchase!

Bought the large and it doesn't seem to stick out from the seat too much. A nice & sturdy bag with enough space for everything, I no longer need to take a pack.