The hot-shoe receivers will cost $99 and the Laso transmitter will cost $159. That makes their transmitter considerably cheaper than the Canon ST-E3-RT, which typically costs about $250. The $100 price tag for the receivers also sounds like a solid deal. For instance, if you have four old 580 EX flashes, you can bring them all into the RT triggering system for less than the price of buying one new 600 EX-RT. Of course, we'll have to test them out to know if they can come close to the Canon first-party product in terms of reliability, so look for a review down the road.