Fleet
Ambassador is a newly launched cruise line (commencing operations in April 2022) and currently only has one ship in its fleet, although is expected to be joined by a second one next year. The first of those (Ambience) originally launched in 1991 and previously sailed for P&O Australia as Pacific Dawn, whilst the second (Ambition) launched in 1999 and has moved around between various lines including Costa and AIDA Cruises. Both ships are planned to be extensively renovated before entering service, and the line has laid out impressive plans for its new brand identity, but naturally you're not going to find the same quantity and quality of facilities that you would on board newer ships.
Guests
There is more to Anbassador than just cheap prices, but there is no getting away from the fact that value is the line's primary selling point. You will not find the levels of luxury offered by a lot of other lines, but for those on a tighter budget it's an attractive option.
Apart from occasional one-off sailings that cater for multi-generational family trips, Ambassador is an adult only cruise line and is aimed primarily at the over 50s market, and particularly those who are looking for a more traditional cruise experience.
Style
Although it would be unfair to suggest that Ambassador is defined by the age of its ships, the fact that both of its vessels date from the 90s and have been acquired after being retired by other cruise operators is a fairly clear signal that you're unlikely to find cutting edge style and innovation on board. There are some modern touches, but the overall emphasis is very much on the traditional.
That translates into Ambassador being at the more formal end of the spectrum when it comes to things like dress code, although like most other lines it has embraced the trend of only requiring guest to dress up for designated formal nights, with smart casual attire acceptable the rest of the time.