It can be good. It can be bad.
If the major owner is a “ good guy” he may have the interest of the property at heart, given they have a large investment in it.
On the other hand , they could be the owner for hell, and refuse to any investment in the building and support rules that support their interests.
Have a good look at the property. Is it in good condition? Or is lots of obvious maintenance required.
Look them at the meeting minutes. You won’t be able to tell who voted for what, but are there lots of motions that are reasonable being voted down.
look at ALL the correspondence. Is everyone getting a fair say, or is one owner dictating to all the others.
It could be a good investment. With some due diligence it’s not hard to pick the good from the bad.