Well I finally got a case of TMF Preload to try it out. It took me a long time to get around to it because of the expense of shipping it all the way up to Canada, but I paid the extra just so I could try it. USA residents have no idea how lucky they are when it comes to shipping costs! Anyway, I was expecting it to be nothing more than Ultrapac with a TMF label on it, but could tell right away when I mixed it and started spraying that there was a difference. Preload is a little more "fumy" but not in an overbearing way. I didn't need to go get a respirator out of the truck or anything like that, but you could tell there is definitely solvents in it which is great for cleaning ability but does produce a vapor. Anyone with a sensitivity to vaporous fragrances or smells may not like this product for that reason. Ultrapac has a sweet fragrance compared to it but customers are not concerned with fragrance, they want cleaning results so it's all moot. As far as cleaning ability, from what I've used it on so far I would say that it has a reasonable cleaning performance which is definitely better than Ultrapac in comparison as I consider Ultrapac to be a serious Underperformer. The preload cleaned reasonably well on both medium and heavy soiled carpet. There are better performers out there in my opinion, but most of those are powder based, so for a liquid I would say Preload works pretty good. Easy to use, mixing is a snap when you have a courtesy hose on the truck. 45oz for a hydroforce means fill it to the line which is already on the jug of your hydroforce, this eliminates the need to get out the funnel and measuring cup, just fill to the line, top up with the courtesy hose with hot water and you are set to go, which makes it easier and faster to mix up than powders. Cost effectiveness I would have to say not for me, but for most U.S. based carpet companies it is competitive if you prefer to use a liquid prespray. TMF offers a great shipping rate within the states which really helps, and you know that your purchase indirectly helps to support the forums as well. Unfortunately as a Canadian I get hit with huge shipping and brokerage fees so I cannot say it is cost effective for us up here so Americans rejoice! So, bottom line I would say it is a good prespray for a liquid, and it is nice to know that the product had the input of an experienced carpet cleaner in it's design. For anyone that uses liquid prespray in the States, i would recommend this product.