i have been burning marth pellets for past 10 yrs. always consistant quality hardwood pellets. i have to drive 20 miles past tractor supply and the marth is 20% more expensive than t.s. but i usually don't burn for heat as much as 4-5 hrs in the evening for just having a fire in a stove. pellet prices in the last few years have made pellets so much more expensive than even bottled gas i flinch at burning full time. anyway..........the t.s pellets were ok for me. they do leave more ash but no more than i have gotten from an earth sense store when i had to substitute for marth. for the next trip for 1/2 a ton anyway i won't be driving the extra 20 miles.