I use Mystrika for lead generation to get leads for my marketing agency and it saves em a lot of time. It's a huge plus that I don't need to juggle many tools to achieve that.
Their email warmup has been great, and when really helpful with email delivery. Have done multiple tests across my own and friends accounts, and they have been consistent with that their dashboard show for delivery %.
Took me some time to get used to the software, but that goes with most software anymore.
Lately, I have been using their AI features to write emails, generate full email sequence and they have been great, though needs little magic sprinkle on the top to fit my liking.
Over all good product, no complaints so far.