Take the time to learn it and use their support - they're great. I built my entire B2B business model on it, and I'll never go back.
We use it to reach out to cold leads and then take them through a pipeline until they say yes, no, or later and always know when to follow up. This has made being a solo-preneur much easier and the system is easy enough to create quick training videos, plus they provide them as well. I recommend Streak to anyone with a product, coaches, personal trainers, real estate agents, multi level marketing / network marketing agents, etc.
From there, the people who have ordered are in their own phase so we can send them specialized promos. It's a fail-proof system and we now have 17k leads total, over 10% of which have expressed interest. We'll then sell them other products and expand our business. All super exciting stuff!
I really can't say enough good things! I should also add that we doubled our revenue from last year and have barely had to spend time on the phones. This email system is where it's at.