The visa was very easy to get. Everything went on fine.
Also, the Sierra Leone Embassy was asking a very expensive visa, whereas on the website I paid only 30€ (for Mauritian nationality)
When we arrived in Sierra Leone by land, we had some trouble at the border. We called Bimbola Carrol, who has been very, very useful. He talked to the immgration officer on the phone and it went all well. We then needed some recommandations when we were in Kenema, and despite the moment (a sunday morning) again, he has been very helpful.
I therefore highly recommend VSL, specially if you are travelling without any contact in Sierra Leone.