new mower / is it worth the purches

[Kennedy's Lawn Care]

I just bought a 60" Bad Boy Elite from T S C Does anyone have any good or bad info on this mower ( 26-HP 747CC Kohler eng.Zero turn ). When i first used it the stearing seamed very stiff, if i hit a bump it jumps to one side and screwes up my straight line.
does it need a break in period.
any info would be appretiated.