Some require special tools for installation, and you have to take into consideration getting the right baby gates for stairs. (wetheparents.org)
However, removing the back - panel is quite a task — you can not do it without using special tools. (techtree.com)
When something goes wrong with this car all the parts are hidden and require special tools so you will have to take it to a dealership or something to get it repaired. (autolist.com)