What do you like best?
Lotus Notes has a very great meeting scheduler attached where you can view when other members of your team are available for a meeting. Filtering emails is easy and painless. Instant chat is a huge help and very easy to do. We are able to quickly and efficiently communicate with people and if they are in "Do Not Disturb", in a meeting, or out of the office, it gives a great prompt to send an email, painlessly.
What do you dislike?
There is very limited space for storage so if you like keeping a lot of emails, you'll have to store them somewhere else. It's not like other platforms, so it's a bit harder to adapt to. I've been using Lotus Notes for a month and barely know any of the capabilities other than the bare minimum. (It's quite the learning curve if you aren't exploring it.) At our company, Lotus Notes is strictly enabled on our desktop computers, in order for us to use it outside of the office we have to connect to a VPN and it becomes a bit of a hassle sometimes.
Recommendations to others considering the product
Lotus Notes is very different from Outlook. If you have been using Outlook for a while (like I have) the learning curve is steep and it's very different. If you are indifferent to Outlook, it's not a bad software. It's very overwhelming at first, and you might need a teacher to walk you through booking your first few meetings.
What business problems are you solving with the product? What benefits have you realized?
Our company uses Lotus Notes primarily for scheduling company wide events. It's been beneficial to us as a company to plan in advance, utilize the email notification capabilities, use the calendar. The instant chat has made communication quicker at our company rather than dialing the phone or going to visit other offices, especially with our national and international offices.