Ask HN: Launching a SaaS startup with free plan first?

I am excited to launch my startup soon and I was wondering if it makes sense to give out a free plan so people can test it. A free plan with all features enabled that is.

I am planning to offer three pricing plans and I am thinking of three combinations:

1) free (basic features, with trial period which ends automatically), basic (paid, more features), advanced (paid, even more features)

or like above feature sets: 2) basic (paid), advanced (paid), Pro (or a better name, paid)

or 3) free (free forever, basic/limited features), advanced (paid)

Does it make sense to give out all features on the free plan so people can test it and potentially give feedback and/or report bugs? Is it risky to give away everything in the beginning because I could disappoint the people when the testing period is over and they would have to switch to a paid plan?

Would it make it easier to tell the people upfront that the free plan (with all features activated) will only be there for a period of time until the paid plans are ready for use?

I am very excited and I just can't decide which way to go.

The product is ready and I am lookinging forward to launching soon.

You can find more information about my application at https://github.com/triggerfsio/packages

Please note that nothing is officially launched or ready, yet (in case you want to test something). It will be in the coming weeks hopefully.