I have no experience with Flixbus. However, almost all of your questions (save the availability of food for purchase on your specific buses) are answered on Flixbus' FAQ webpages. When you have questions, looking at the carrier's FAQ is always a good place to start.
- Identification and Location is discussed on the page called "Route and Delay Information." Under "Where is my bus stop," the page says:
Where is my bus stop?
The address as well as a screenshot of a map with the bus stop can be found on your ticket. You can also use the navigation in our App to find it. Here's how:
go to “Stops”
choose the bus stop you need
get directions on your phone by clicking the “navigation” button in the lower right corner.
You can also find the address of any stop via Schedules & Stops.
The individual bus bay for each ride can only be found at the bus stop / station (usually on the big screens).
The Flixbus webpages show pictures of Flixbuses — they're bright green.
Searching Google Maps for "Nepligent Flixbus" returns a map showing the large bus station across the street to the southwest of the Nepligent park.
Can I reserve seats for my trip? Where can I sit?
It goes without saying that you will always get a seat on our buses. Depending on the trip, either any place on the bus can be reserved or only certain rows. For certain buses, we do not offer seat reservations. Please check your ticket for your seat reservation.
If you have not reserved a seat, but have been assigned a seat on your ticket, please sit in this seat. You will find the seat numbers in dark grey at eye level on the hand luggage compartment. If you have not reserved a seat, and have not been assigned a seat on your ticket, then you are free to choose a non-reserved seat with a green sticker. If a reservable seat is free, it could still be booked by someone later on in the trip. For this reason, please only sit on a free seat that is not reservable and is labelled with a green sticker.
For a journey (consisting of two rides) with automatic connection, you will have to pay only once for the seat reservation and will get the cheaper seat reservation for free.
- Toilet availability on the bus
Remaining on the Booking a Ticket for your trip page, select "Preparing for your trip." This text appears:
How are the buses equipped?
Each bus is equipped with air conditioning, toilet, reading lights and comfortable seats. In addition, we offer free Wi-Fi, and some buses also have refreshments and snacks, sockets, USB ports and a media center for movie and music playback on request.
During a trip, it is possible that the bus may travel though an area with limited reception, and as a consequence it may not be possible for all passengers to access the internet simultaneously. In rare cases, the free Wi-Fi and power outlets may not be available, for example if a replacement vehicle is in use or if we sell tickets as a sales partner.
This is a matter of opinion, and thus off-topic here. Still, one can observed that Flixbus is a very large business, operating in many countries. If it weren't reasonably safe for its customers, the business would fail.