I build my own funnels, website, landing pages etc. So I use BrowserStack to ensure consistency of UI on a platform agnostic basis. Particularly as it relates to mobile devices. Before I came to using this tool, I would get feedback about glitchy issues that I was oblivious to. This tool helps me ensure consistency of customer/user experience and elevates my professionalism.
Pros
Ability to flick through different device options in one interface
Exhaustive and constantly updated options, to keep with new product releases
Ability for a non-tech person (such as myself) to navigate the platform with ease
Cons
Limited scope for testing on free version
A low fee option (with limited functionality commensurate with price) would be great for non-tech people who need this infrequently as opposed to the needs of power users.
Likelihood to Recommend
It's the most simple tool to fill the gap that I identified when building out my tech platform. I recommend it to others like me, who are daunted by complexity and want a simple, point and shoot solution.