Wirecutter

A fully waterproof, seam-welded touring classic made for rain and snow and lots of gear, this pannier (sold in pairs) is nearly indestructible.

amazon.com

bazaarvoice

This pannier, which converts to a shoulder bag, provides maximum laptop protection. Plus it has zippered exterior pockets that can hold your wallet, phone, and transit card.

powerreviews

expert-review

Arkel Signature V Urban Pannier Review | Gear Institute

If you’re a commuter who likes to carry all the things, load up this messenger-style bag in the morning and then park it next to your desk for easy access to your stuff throughout the workday.

OutdoorGearLab

The Arkel Signature H Urban impresses with its stylish design and huge storage volume and is our favorite design for urban riding. The enormous main compartment is big enough to fit two shopping bags worth of groceries, includes a padded laptop sleeve, and is secured with a dependable waterproof liner. The 1000-Denier Cordura nylon is incredibly durable, and the multiple handles and shoulder straps allow for carrying it like a tote bag or like a messenger bag. With an easy-to-use aluminum mounting system, the Signature H has superb all-around performance and makes a great pick for commuting or general urban use.
While it's hard to find any weaknesses with the Signature H, we would have appreciated another storage pocket or two to help keep our gear organized, as the only external pocket is a little small and placed in an awkward spot on the pack. This model is also a bit on the expensive side, but its value is easy to justify with such high quality and versatility. 
Read more: Arkel Signature H Urban review

Pannier Comparison