Hi jmf06,
As you can see from my reply to a similar question here … the choice between different types of latex is a matter of personal preference. Different types of latex have different properties and a different “feel” and some people prefer all Dunlop, some prefer all Talalay, and some prefer a combination of the two. 
You can read more about the pros and cons of a quilting layer on top of latex in this article and the last part of this post. There are many people who prefer sleeping directly on latex while others prefer the surface feel of a softer less resilient polyfoam or the benefits and feel of natural fiber in a quilting layer over the latex. The key is to make sure that there isn’t more than “around” an inch or so of lower quality materials in the comfort layers of a mattress so that they don’t become a durability issue.
I would need to know the details of all the layers and components and whether this was a mattress only price to make any meaningful comments or assessment about how it might compare to other mattresses in terms of “value”. It would depend on the details of the mattress, on the cost and quality of the components and materials, and how they compared to other similar mattresses. There are some mattresses for example that use some very high quality European pocket coils with fairly thin latex comfort layers such as Berkeley Ergonomics that are certainly much better than average “value” even though they are in the same price range or higher than the mattress you are looking at. In general terms … Verlo is certainly “better than average” value but not in the “best” value range although value is not just about the “commodity value” of a mattress and also includes all the other objective, subjective, and even intangible factors that are the most important part or your personal value equation.
Again … it’s really not possible to even “guess” what someone else may feel on a mattress when the details about the layers or design or the thickness of the latex they would be adding isn’t known. Every change to a mattress would make some difference in how a mattress feels and performs because every layer affects every other layer to some degree but the nature of the change or how someone else would perceive it is very subjective and would vary from person to person based on body type and sleeping style as well as individual perceptions. The question is too general and I don’t have enough information about the mattress or reference points about your own perceptions to give a specific answer other than saying it would most likely change how the mattress felt.
I personally would be hesitant though about buying a mattress that I hadn’t tested or where I was unsure of how it would feel (either online or locally) unless there were good options available after the purchase to exchange the mattress or make adjustments to the individual layers that had a good chance of success in terms of matching your specific needs and preferences. Your conversations and experience with each manufacturer or retailer your are dealing with and their confidence that they could “fine tune” a mattress if your initial choice wasn’t the best one for you would likely be a big part of your confidence with a particular choice as well. The better your options after a purchase the more it can lessen the “risk” of an “unknown” purchase whether it’s online or locally.
Again though … to make any meaningful comments about a mattress I would need to know the details of its construction and the materials and components inside it.
Phoenix