Hi
Our girls are 16 and 15. It is actually my daughter and her best friend- so we booked 2 seperate rooms. This worked out well, as we asked for adjacent rooms when booking, and this is what we got. I can't comment on the suites, because I did not see them, but both rooms had 2 large beds, and you can have privacy in the bathroom, so it would be suitable for a brother and sister.
The girls could be independent there - they made their own way to breakfast, found a sunbathing spot for the day, and ate lunch on their own as well.
There are activities going on the day, and I believe they did join in some of them
We met up in the evening for dinner and then they went off on their own,- they sat in one of the bars and watched the shows.
They tried the disco on their last night and said it was great. You are supposed to be 16 to get in, but there are no adult/over 16 years wristbands so my 15 year old had no problem.
I felt very relaxed about safety issues, because the hotel is secure. The only people there are other tourists.
In my opinion, it is great for teenagers because as it is a complex of 3 hotels, there are lots of different bars/shows for them to go to, but as a parent you have the comfort of knowing that they are on the complex . It gives them some freedom, but in a controlled environment.
The girls absolutely loved it there.
I will say that they had no problem being served alcohol. They have a sensible attitude towards drinking and had a couple of drinks, maximum, a night, but as a parent, it is a factor to consider.
We have been to the DR 3 times before this trip and this is the best place that we have found for teenagers.
You can all have your own space , but the parents do not have the worry .
Hve a great holiday.