I own a TRS25 and a burris fastfire 3...hands down the fastfire 3 is better BUT I have no issue using the trs-25.
The fastfire 3 is on my turkey gun and the trs-25 bounces back and forth from an AR15 to my 44mag revolver. I put it on my shotgun and did not like the lack of field of view and it sat a bit higher and I was not sure it would handle 12gauge punishment (I am no longer scared of this as it handles 44mag punishment just fine). Anyways, the burris FF3 is lighter, smaller, and gives a nice field of view since the housing is small (if the turkey runs outside of your field of view...you can still see it since the edges of the FF3 are so skinny). I close my left eye when I shoot (I have tried the whole both eyes open thing and just cant do it). So if it were between the 2...id save up for the FF3 and get that but if you truly cant afford it, which some cannot, then id have no issue using the TRS25.