Pros
Sage has been around a very long time and has grown through acquisition in multiple regions. If you're in the UK, this is probably the company to work for as it is headquartered in Newcastle and has the market for small and mid sized business software.
Cons
If you're in North America, my advice is to consider all your options before coming on board. Sage recently went through another round of downsizing to justify the growth in other growth areas of the company. Frankly speaking, the North America business has been struggling for some time now and with some unrealistic revenue targets set by the executive team, the North America will continue to struggle for the foreseeable future. Before you consider coming in, make sure you are interviewing for a role in a global product because this is where the future will be. If you're looking to be hired in any of the legacy solutions, I suggest that you think twice. All of the legacy platforms are built in legacy programming languages used over 20 years and their interpretation of modernization is nothing more than a pretty UI. We call this lipstick on a pig. In addition, beware when you hear the terms "One Sage" and how they're transforming to be a technology company. Internally, "One Sage" has been interpreted to be "The SK (Stephen Kelly) Way." As for it being a technology company, the extend this company can really go is their ability to tweet as much as they can to give off the image that they are a technology company. If you don't believe me, see how many tweets the CEO and the company puts up on a weekly basis. Internally, many believe that the CEO should be spending less time tweeting and more time selecting the right executives instead of keeping legacy executives such as their CTO, CFO, and CMO. Multi national companies are a thing of the past - if you want to win, you need to break things up the same way other multi national companies have done recently. This last bit is my personal opinion and a prediction on what I think will happen by 2020. The CEO is hoping to monetize and grow the global products and he's putting a tremendous amount of investment in these areas. If it succeeds, he likely get revenues to a point where it can sustain the company globally and spin off the legacy products in the various regions. If he fails to generate the revenue, then he will have no choice on his hands but to keep certain high revenue generating products, change out the executive management, and keep churning until he reaches his revenue targets. Either way, Sage is in a very rough ride the next 5 years.