What does the company do well? It has a few number of benefits.
1- it provides very fast WordPress processing speed.
2- sub_domains can be created in a very few steps.
3- email management system is very efficient.
4- they provide services in a very reasonable price.
What does the company not do well? There is not too much to dislike about SiteGround. But they should focus on Customer Support; rather than providing solution they like to up-sell.
What do you wish you had known about the company before using? I was using SiteGround but now we have switched from SiteGround to Cloudways. which is providing more benefits.