I have an option to rent an apartment in the 15th arrondissement (Rue Foundry) which is 10 mins from the Eiffel Tower or an apartment in the 10th arrondissement, 100 meters from Canal St. Martin. As I am the only adult traveling with 6 (mature) teenagers, what would be the best option? Safety is obviously the first concern, but I also want to be in an area where there are nice restaurants and cafes open late. We intend to do a lot of walking around so the more "central" a location the better.
Both areas are completely safe. It's a fair hike from the ET to most of where else you'll be. Stay down by Canal St Martin; nobody seems to pay much attention to that area on this forum, but it's absolutely great -- and much more "central".
I agree with Ed. I've stayed close to the Canal St. Martin, and it's safe, neighborhoody, and very pleasant.
We've stayed in a couple of different areas of Paris before and I'm not sure you can go wrong (unless you're way out in the suburbs of course!) As long as you are close to a metro stop (which you undoubtedly will be) then you can get anywhere - and the food is good all over the place... salivating just thinking about it!