Sounds like these people don't know a thing about paint. If you prep your walls correctly, using a primer like the back of the can says, your paint job will be much easier, cheaper, and the paint will preform like it is intended. Also, you get what you pay for. If you use a cheaper paint, which will also instruct to prime, you will work harder applying the paint and get a lesser quality paint as well. This means a paint that is not as durable and your paint job will have to be redone more offten. Again, costing more money in the long run. Valspr Signature is by far the BEST paint that I have used. It was very easy to apply and has had long lasting results. I also highly recomend Valspar's Duramax for a great exterior paint. ukrfoxes may like it since it is a self priming paint.