I'll be running the Agtron ISO system this year into my PRO600 screen. I switched from IAS because I sold the drill that it was on with the system and Agtron had a 25% rebate on trading in an old system (I had a 50 run Loup sitting in a box). If I don't like ISO, I can switch over to the tablet at some point. I really like the look of the connectors on the system compared to the IAS setup I had last year. Also, the zero restriction sensors I will appreciate.
The IAS 90 degree sensors worked at detecting blockages, but in large seeded crops like fababeans or lumpy fertilizer it was the sensors that caused the blockages the majority of the time. I also didn't find the IAS system to be as accurate as I had hoped. It uses percentages rather than actual numbers of hits to show total tower flow. I didn't like how the percentages skew if one tower is getting less. It seems to minimize a partial blockage because of it. Reading total hits would work better in my mind. As a blockage only monitoring system, it worked great in everything except corn and soybeans where the seed treatment is a little more dusty than on canola. The sensor plates would build up and sensitivity was decreased.
The IAS screen setup is great, and I never had an issue with the wireless. Had 2 modules go out (was a known problem but they just missed them) but they were prompt with replacement. Make sure to order an extra one, because the one that is down is always going to be on the tower that plugs!!!