I cannot recommend this tour enough! After looking through many reviews on Tripadvisor / elsewhere, this was the one that best met our needs (a half day tour that included the sunset), and wow, did it deliver!
Our guide Alvaro was fantastic: he really "read the vibe" well insofar as knowing when we were in the mood for information & when we wanted to relax / enjoy the car ride, his English was excellent, and he truly had a lot of fun staging & creating our amazing photos & videos of this beautiful area. Alvaro & our driver Cristian also really customized our tour - he joined us for a hike (which was so helpful), & we were able to spot some flamingos & move closer to see them! Overall as female travelers we felt safe & well cared for the entire afternoon.
Also the tour itself was great - this was the perfect length of time in Uyuni in my opinion: we got to see everything we'd hoped for (while not being in the sun for a full day), and it was one of our favorite tours in South America.
Finally, I was a little nervous to book since there were no reviews at the time, but I learned that Joker Expedition is a new company which is why reviews are limited & I would recommend them to anyone in a heartbeat. We booked them for a separate drive & the main point of contact, Jose, similarly took care in customizing our experience while communicating with us about anything needed prior to the tour (e.g., galoshes sizes for the lake portion of the Salt Flats).