Excursion in Calvi, Corsica

Through Trip Advisor I have found an excursion in Calvi and was wondering if anyone else has used them or a similar company. The company is - Corse Adventure 4x4. They have good reviews and we like to get out and see the countryside. It does not bother us to be riding in a jeep. They have half day and full day tours. Any help would be appreciated.

Thanks

I checked them out and I think it would have been a lot of fun, but got outvoted. I would take a half day to leave time to visit the old city. It is more than worthwhile seeing it.