Dmrad, congrats on the new trailer! I have a 2009 Heartland Bighorn that I bought used. I can't comment on warranty response as I haven't used it, but I belong to the Heartland Owners Forum and just like ALL RV manufacturers warranties, you will find those with good reports and those with bad. Much of the trailers components are not manufactured by the RV company and those tend to be a fair amount of the warranty issues people run into.
As far as part of your question requesting comments on the Heartland brand...I have found the workmanship of our BH to be very good with only minor issues. I have owned a number of different RV's over the years by different manufacturers. They all have had things that I liked and disliked in their construction. If you look beyond the fact that you "get what you pay for" and more at how well the unit is constructed, I think Heartland is one of the better. JMHO.
Hope you have many enjoyable trips in your new unit.
'03 Dynasty Chancellor 40' A/H - '93 Jeep Wrangler YJ
Life has many choices, eternity has two...choose wisely!!!