Pros
Supermicro is an interesting company. You can touch your lowest or highest here but it is a very solid organization. You will have your days where everything you did was done wrong and you will have your days when the CEO will call you in his office and ask you to move a mountain because you are the best. Bottom line, if you are hardworking and motivated, there is ample opportunities here where you won't find in any other organization this size.
Cons
Everyone is considered Jack of All Trades here. You could be in Sales and doing Marketing. You could be in Accounting and doing Purchasing. Engineers are promoting products and managing employees. No set boundaries. Good for some people who are willing to role up their sleeves and do the work outside of their responsibilities, but if you want to stick to just your skill sets, this company is probably not the best company to join.