I've used other apps that do similar things, but I like that Blisk sits in my dock and launches in its own browser when I need it.

I haven't explored all the options yet, but being able to save a device set has come in handy when a client says "but it doesn't look like that on MY phone" - I can pull up specific sets of devices and test in whatever configurations I have loaded.

This one's a keeper and I'll use it often!