We also use the Gel MTS but we have ad the same issues as mentioned above. It is very sensitive. We pick up a lot of Anti-D due to antenatal RhIg. We also pick up cold abs and rouleaux. We stopped using it for ABO/Rh typing because it takes 10 min. for results, tube is faster. On a positive note, Its great because you less volume, easy to set up, no washing involved and you can walk away during incubation and/or spinning phases.