Comparing Instantly and Smartlead for Lead Generation Tools

I'm currently using instantly and it's been quite buggy :(

Has anyone used both instantly and smartlead to compare which one has worked better for them?

My workflow is quite standard : I use the clay instantly connection to auto populate my campaign with leads clay enriched - I don't use instantly to find net new leads, solely sending emails with their “Done for you” email accounts

Would love to hear from all of you experts before I transition to smartlead

And maybe there's even a tool in missing instead of those two I should try?