We did two activities with twenty3 extreme, Via Ferrata and Wadi Tiwi. Both were beyond amazing! Our guides (1. Hamid, 2. Chris) were super funny, informative, professional and well prepared. Communication beforehand was easy and helpful, we were given lots of tips regarding which tours to do and they even made a tour possible for us even when they actually were fully booked. We were picked up both days from the point where you need 4x4. Luckily, for both tours, we had the guide and the place completely to us, which was awesome. Even though the tours are more expensive than the ones you can book with not so official guides, I highly recommend going with twenty3 extreme, if only because you feel more secure with the heights, the jumps, the abseiling, the equipment and because you have a trained guide. And because you're going to have a hell lot of fun with the guys! Just stay away from the weird Australian guy (just kidding, Insider ;))