Cleanfeed

Pros: Easy to use on both sides as you only need to send a link to the other person. Also it looks really simple (good).

Cons: Could not work out how to remove echo, even with everyone using headphones and mics.

Overall: Frustrating as I was really hopeful but having arranged with a few people and using up their valuable time trying to set it up, it just didn't work without a huge echo.

Pros: This software is one of the best I have ever used. Crisp, clear sound with no interference or interruptions. Perfect for interviews and podcasts. I highly recommend!

Cons: To be honest I haven’t encountered any part that I am unhappy with.

Overall: Overall I would say this is one of the best products on the market and would highly recommend to anyone who’s not sure… It’s brilliant!

Pros: No software or downloads required - runs on a wide range of browsers, easily shared with clients who can use almost any device from laptop microphone to full studio setup, ability to split and record each remote input individually, insanely low latency, adjustable settings for quality etc, simple and easy interface

Cons: Nothing.

Overall: Absolutely delighted with Cleanfeed from starting as a free user and getting comfortable with how it works to migrating to a pro licence and being blown away by how simple and straightforward it is - yet excellent studio quality sound and recordings.

Pros: Guests can join via smartphone, laptop, PC or table.
Vey good sound quality.
Easy to use during recordings.
Clear interface.

Cons: The echo. There is no echo cancelation and it's the deal breaker. You juts never know when it is going to pop up. It's a terrible issue because you spend valuable time trying to correct it and it's hugely embarrassing when you have guests. They have a so-called help sheet on their website but all it seems to indicate is that they cannot help you. they suggest options to try but when none work, you're on your own. Instead of trying to blame you, maybe the creators of Cleanfeed should just install echo cancellation.
It is also unreliable with connections. Some guests I have had were not able to connect. they joined the feed but either couldn't hear me or I couldn't hear them.

Overall: Gave up on it after it let me down countless times. 2/10 as it had gradually became more unusable. Trial it countless times before paying for it.