I agree with the suggestions. Although it would be even better if the checkmarks could be added in a more simple way, like checking a checkbox or something.
Getting rid of the price might be a little difficult, since that one is specifically used in the templates (at least for the gray template). However, it would be great to be able to choose the currency. Now I have to edit the template file in order to change the dollar-sign into the euro-sign.
What also would be great is the option to have the button displayed at the bottom instead of the top of the table.
Finally, a suggestion to add the ability to edit the name of the features, instead of having to delete them and add them again.
All in all, thanks for this great plugin. As far as I've noticed it works fine.