If you are talking about the one that is located on the same street as LVH.
I have been there once it was a fairly new property at the time I think it is has been there for a few years now.The rooms were okay they look like they were going for a more modern feel so the rooms weren't outdated.The room I was in small but nice.

LVH while being renamed it seems that the rooms have not been remodeled in my opinion.Everything still looks the same.You will probably have better food selection/restaurant choices if you stay at LVH since the only thing around the Springhill Suites is Rivera hotel or somewhere you would have to walk or catch a cab to grab something.
Both have decent clean rooms sorry I don't have info on deposits or employee attitudes.
Should not have any issues with safety with either hotel in my opinion.
Enjoy vegas

LVH was just sold and will probably be moved into timeshares.

While it is still functioning as a casino, Hotel - I would opt there. It is closer to the monorail, has restaurants (probably room service - in case a date goes long)....just more options in Full service hotel.

Springhill Suites are nice, I think it is right opposite the LVH.

 
If you do not care about services - SHS will probably have nicer rooms and quieter atmosphere.