Is there an advantage to one over another? I prefer the front load, it seems less likely for me to burn myself loading this way (I wear gloves but I'm a born klutz). I was actually looking at the Progress, but then realized it was a side load only and we're not set up hearth pad/stack wise to accept the clearances of a side loader. (I don't plan on replacing the Lopi any time soon, but I had the sister of my stove-the Endeavor-on my "wish list" for about 10 years now, so I was thinking ahead to the day I might want to replace this one, especially for longer burn times). It made me wonder why all these options exist-is it preference, or is there really a valid reason (better burn times somehow, etc)?