Myriams apartment is simply great - you can't stay more central than that. The location is within walking distance to most of Paris's tourist attractions. It is located adjacent to a metro station (line 1). Everything you need for an amazing stay is at your doorstep - supermarket, restaurants, bars, shopping, metro...
On top of that, The apartment itself is very clean, equipped with everything you need in a very secure building so no need to be concerned.
Myriam is a great host - always available and willing to help.
I would highly recommend and will definitely return.