Not all 3D tours are the same. I use the latest PRO2 Matterport 3D camera which is a whopping 134 Megapixels. There are cheaper 3D providers out there but please keep in mind the following when hiring:
*There are other types of 3D (iphone attachments, other types of cameras, older Matterports), however, nothing compares to the sharpness of the PRO2 Matterport. See samples below
*I do not use still images (regular MLS photos) from the Matterport camera. The Matterport is an amazing 3D camera but the still images are inferior. I shoot professional quality photos from a Nikon SLR and ultra wide angle lens.
*I completely edit my 3D tour from beginning to end to ensure smooth flow through the property. You should not be getting stuck, going through walls or experiencing other mistakes that will give a bad user experience.