The only TNF item I use is a Nuptse Jacket, purchased on sale. I chose that particular model over other brands because, for my particular needs, it presented me the best compromise between weight, insulation value, quality and price. That specific piece of gear works for me and I'm happy with it. There are other TNF products that I would never consider buying for a number of reasons, but the same is true for almost any other brand.

Terms like "too heavy" and "too expensive" are completely relative and vary from consumer to consumer.

Like any other line, TNF products suit some people better than others.