I agree with Mountain Man on what you are comfortable with. I used @value for years and tried Report Builder last year, didn't like it, and moved back to N1 (the new @value). I had some problems with RB technically, and it could have been on my side. I purchased it, worked with it for months trying to build a template, and only got one appraisal out using that software. I went back to N1 and had an appraisal done in 3 days using the new version.
These decisions cost me some money, mostly in time and mostly with switching to Report Builder. The actual cost of the software package can pale in comparison to lost revenue if the learning curve for the software, any software, is high.
I am one of those guys that is always looking for increased efficiency, and it's because I personally enjoy the quest. It probably costs me as much as I save, but that's OK.
I still use DataComp as an additional database to N1 just for security.
I haven't seen the software that is the topic of this post, or heard any reviews on it.
There are a couple of features N1 has that I don't think they push enough. I know they read this forum so this is as much for them as it is for you.
Let's say I work long and hard and put together a really strong sales comparison approach with lots of information, discussion, etc. I get another assignment and can use this approach again. I can copy this approach to the new appraisal very quickly and the fields are remapped for my current appraisal. I change a few adjustments and unit of comparison for the new appraisal and hit update and it puts all the new information everywhere in the new report, i.e. value for the approach, effective date, etc.
Also, you can save entire sections under the auto text section and tab them for reference and insert quickly. In my real estate tax section, I quickly set up template for 1-5 parcels. So, if I have three parcels, I enter in all the data in excel, go to word and with three clicks enter in the sheet for 3 parcel and hit update. This updates this section and my executive summary section.
The Google Earth mapping feature is just really cool. You need the lat/long for the subject and comps and it does the rest.