Need some adive on a dilemma im having

So i have been interviewing with two companies recently and one of them send me an offer. I am more interested in the other company but they continue to send me into interviews (this would be the 3rd interview). Do you guys think i should take the offer from the first company or pass on it and see if i land with the second company?
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WGU MS:ISA (February 2016 )