I did try their Microsoft Clairty demo but their heatmaps/recordings were bugged and with a strange/hard UI. Even now, if I try to play a recording on the demo dashboard the playback is empty, it seems to be in an early alpha stage.
I wouldn’t personally recommend anyone to add a free 3rd party session tracking script, especially when it’s sending data to Microsoft. Also keep in mind that they don’t offer full analytics, only qualitative data.