What does the software or service do well? Octoparse is a good web scraping tool with very great capabilities especially for research work, and it is prizing is within reach. It can be used to scrape a huge variety of data on many websites, and the customer support is fantastic.
What does the software or service not do well? It took me some time to learn how to use it but if you are willing to learn it is worth the effort.
What do you wish you had known about the software or service before using? Wish to have known they provide some task templates which are easy to handle. So I could spend less time on the tutorials.