The benefits of Krav Maga are obvious: ruthless practicality, simplicity of learning, development of an aggressiveness trigger, etc.
But why add Muay Thai to the mix?
You'd have to ask Master Garcia, the founder of ABD, for the official answer. However, I can offer an opinion.
I think there are a number of reasons why a Krav Maga student might enjoy supplementing her training with Muay Thai... and here they are:
1) It's a good fit. The top level Krav Maga experts in the world would not deny that a good deal of KMs techniques - specifically, the combatives - are taken from other martial arts systems. Muay Thai, with its emphasis on power generation through factors other than brute muscle, fits nicely into the striking section of Krav Maga, specifically the elbows, knees, and devastating kicks. Krav Maga is concerned with delivering maximum power with every strike, and Muay Thai's long lineage of technical refinement supplies that power generation.
2) It's a great workout. Krav Maga places a great emphasis on physical fitness... and it's nearly impossible to train in Muay Thai and not get in shape. Thai pad rounds alone can reduce someone to a state of fatigue very quickly... and there's something really satisfying in kicking those pads as hard as you can
3) There's nothing fancy. Muay Thai, known as the "Art Of Eight Limbs" does not waste time on fancy, Hollywood-style techniques. Everything impractical has been weeded out and all that's left are high-percentage strikes and techniques.
4) The availability of competition. Krav Maga, only concerned with survival, is not a competitive system. But Muay Thai is a sport, and offers the possibility of getting in the ring against another trained fighter, if that's your interest.
At ABD Norwich, we place almost no emphasis on competition, and have very few students who choose to fight in the ring. However, I love including Muay Thai in our classes because of the sheer technique and power generation available. If you've ever watched a traditional Thai match - those guys are not very big compared to average Americans. But their kicks land like baseball bats. Through the techniques of Muay Thai, a smaller person can learn to deliver a lot of power - and obviously, that sounds great to students of Krav Maga.
I always look forward to the Muay Thai component of the ABD program for just that reason... honing my movement to deliver maximum power with maximum efficiency. And taking a look at our classes in Connecticut, everyone else likes it too.