The gmail integration is amazing and the best I have seen. You can add prospects, send templates, up meetings etc in Gmail. I pay for the sales suite and it is great! Also come with a meetings app, chat feature for your website and a basic follow up system. I also love that they have a completely free version of this product to start off with.
I don't like that on their sequences feature in sales that you can only set it to email and complete tasks until they respond. Its a great feature to have it terminate with a response but I would like to be able to set sequences for longer periods whether the clients respond or not.
This is a great software for start ups with a free version and yet is very powerful to manage clients and deals. I like some of the features like integrated templates, chat features for your website and the deals and clients overview make it easy to keep track of whats happening in your business.
You would need to integrate with Mailchimp or something for drip campaigns newsletters etc. These may be features included with the marketing suite that is a little more expensive.
Managing clients and deals.