Pros
I worked at the Metropolitan by COMO, London, for over two years during 2014 and 2015. Having also worked in many UK hotel chains, I can appreciate the levels of organisation and structure that this business has. The Met is definitely what you would expect from a 5* environment on Park Lane - laundered uniforms, 3 course staff meals, regular communication meetings, yearly pay reviews, appraisals etc. These perks certainly made COMO a great company to work for. COMO has properties in some of the most beautiful parts of the world, and occasionally staff were asked to travel abroad to support these hotels (however, this was often reserved for long standing, senior employees). I would definitely recommend working for this company in any capacity. It looks great on your CV, and with hard work and dedication there are opportiunities to progress.
Cons
From my personal experience, I would say that the hotels rigid structure, can be a negative as well as a positive. Staff were told how to act, what to wear, what to say, which took some of the character and personality away from the individuals. This sometimes created a rigid environment with robotic staff. Having said that, this is often the case in 5* hotels, and is required to maintain the high levels of service.