We mainly use Browserstack. It's a very powerful tool, especially with their very impressive Chrome dev-tools integration, though it can be a bit laggy at times

We mainly use Browserstack. It's a very powerful tool, especially with their very impressive Chrome dev-tools integration, though it can be a bit laggy at times. Quite unbeatable for the huge array of devices they have available though. We also have a device table with some common devices that we can use whenever needed. A recent Samsung Galaxy phone (not sure which model), iPhone SE, Kindle Fire and an iPad etc.