ive just come home from 11 days solo in finale, I would say if you are unsure about it – just do it, and agree what d45yth says about regretting not going. I had a lot of leave to use with work and pretty much took last month off. I felt a bit unsure so kept my schedule pretty flexible in that I booked a one way flight end 7 nights in a hotel and made the decision to stay on a little longer while I was out there.
it turned out to be a good trip did a mix of solo exploring around the trails, few days guided and a couple of days with an uplift company, if I was going for a shorter time I probably would have done purely shuttle days you would be out on it 9 – 5pm by the time you do that get back to your accom clean up and have some food / go out for a few beers you want pretty early nights as the shuttles leave @ 9am.
The only small issue was lack of english spoken, I think apart from A british guy that runs one of the shuttle companys I was the only brit out there at the time! – finale seemed to cater towards italian / german tourisits – there were a few german groups who I tagged along with on the uplift/shuttles who were a good laugh. So if you speak german you would be even better off than me
shameless plug for a couple of vids i made out there …………….oh and happy to give you the contact details of my guides / shuttles accomodtion etc