So far, soooo good! Unlike my previous pump purchases, this one has proven to be very sturdy, and it maintains suction amazingly well. As one who regularly "exercises" (sometimes thrice daily) other pumps have cracked, lost seals, or stripped at the valve connection. Although this particular pump seems to be made with a different polymer, it appears to be better suited for a "fitness" freak like me [^_^]
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