Tell me the product. There are a lot of products claiming to do magic. But using the same channel at the same location is always a problem. You have to do frequency planning to avoid this situation. With sync you can reduce channel spacing need and you may reduce the impact of double using a frequency on the same tower. But when you hit a cpe with the same frequency twice you will get bad results. So you have to do the usual work: Reduce power, realign antennas, further tilt the sectors, …
We use synced wimax systems. Believe me: This does not solve all problems.
I agree.. I spent some money on Cambium PTP200 series products and was not impressed with the GPS sync capabilities. TDMA does help, but is no silver bullet. I still have two Cambium units in production, but they’re scheduled to be replaced with Mikrotik PTP links.