Tourism Visa

I am a UK permanent resident and i am inviting my girlfriend who is a student in Nigeria to come see me. I have provided are with an invitation letter saying she will be staying with me. I have provided my ilr permit and prove of my accomodation. She is a student in Nigeria so does not make money but she will be sponsored by her uncle who has also agreed to write her a letter claiming he will bare her financial responsibilities plus the bank statement to show this . She is providing proof that she is studying by getting a stamped letter headed paper from her university saying she studies here and that she is going on holiday for 2 weeeks after the first semester and expect her back in time for the second semester. She is in her third year. I will also provide a return ticket booking.

Are we good or what else do we need? Please help

Reasons to return, always the mantra, reasons to return.....