I too owned a Coachmen Somerset, 04' 3slide....saw a lot of negative about Coachmen, had the 5er for three years and never had the first issue. Then purchased, brand new, in 07', the 5er in my sig., 06 Holiday Rambler 37RLQ Presidential Suite...heard some bad things about them too. Replaced a front landing gear on one side last year, cheap and easy...other than that, we love this unit, no issues and it's going on 8 yrs old....
Almost every manufacturer out there, no matter the reputation will make one that seems more problematic than the rest or "out of the norm".....