Russian women are my specialty (along with hot Asians). I've dated several long term, and was even married to one with who I had a kid with.
I'd have to agree with everything already stated in this thread. They are golddiggers, and they highly value a man with a good profession or well paying job. They also don't mind dating older men, in fact to provide a feeling of security and being taken care of they often seek it out which explains why the 27 year old hottie in your case thinks it's absolutely normal to date a guy who's 40. So don't let the age difference affect your decision-making.
These types of women are hot, but they're also often straight forward. If you give them the appearance of having money, they will probably fvck you very quickly. They won't use sex as a weapon in the beginning of a relationship like other western girls, but they will use it as a weapon if you date them long enough. They have tempers, but to balance this they also keep themselves in very good shape. They rarely get fat as they age, although it does happen sometimes. They think it's important to always look good, and wearing high heels even to the grocery store is not uncommon.
But be very careful, many of them want a free ride through life (with you as their financial support) which may be a good thing because in return they generally give you lots of great sex and they cook well and clean up the house. They also tend to have a great down to earth sense of humour and are easy to talk to, and they will often express interest in your hobbies. However, they also tend to argue a lot and it's true they're usually spoiled and think they're god's gift to men (hot women are still very similar the world over in this respect).
If your money runs out, generally so will their love for you. These are women who often grew up in poverty and are willing to do whatever it takes to avoid becoming poor again. Plus in the West, they see all the money around them, and they see how much western men worship hot women so they think they are automatically entitled to a good life supported by a rich sucker. Also keep in mind that hot foreign women, when transplanted in the West, often become just as anti-male, moneyhungry, and manipulative as their western female counterparts if not even moreso. Proceed with caution, but have fun while it lasts. Don't be surprised if these women end up dating another dude right after your break up, they are notorious for being able to turn off their emotions like a switch, even better than most other cultural types of women.