i use the robo bevel. i like it, its a bit of money, but a tool i like having in the arsenal.
i have built a number of cedar strip boats and i do not consider it a must-have tool. the most important tool for a cedar strip boat is going to be a low angle block plane.....even if you build with cove and bead.
if you build a boat with cove and bead the block plane is going to see a lot of work on the ends of the strips where you have to cut across the width of the strip to make it all come together. so a lot of the strips at the ends of the boats are all going to get some kind of block plane treatment.
if you do a regular stripper (non-cove and bead), you will also be putting shallow bevels along the edges of the strips where they abut one another as well as the work described above on the ends.
if you do a regular stripper (non-cover and bead) you will use the robo bevel to make the shollow bevels along the edges of the strip where they abut one another and a block plane on the ends. a robo bevel, candidly, makes quick work of those abutting shallow bevels and tends to result in cleaner work becuase of the guide. and if there is a lot of work like that on the boat (and that depends on the design) i found it faster and less aggravating to use the robo bevel.
but the robo bevel does not solve all the problems becuase of its limitations on where it can be applied. the shorter and more curvy the boat, for example, the less you will be able to use it. on longer, straighter boats it will see a lot more use.
i am currently working on a 14 foot petrel play and i have been a bit frustrated regarding the proportion of work that the robo-bevel can be applied to. on a night heron, however, it will see a lot more use. most of the problem, frankly, is not the mini plane, its the guide which is large which gets in the way becuase it wont take a sharp curve or will be blocked by an adjacent strip....i wish i had a mini-guide for the mini-plane so it could see more use.
anyway, i hope that helps.
below is latest pic of a 14 foot boat i am working on with rectangular strips. i would say at this point, the robo-bevel did about 30% to 40% of the bevels and the low angle block plane did 60% to 70% of all of the bevels.

h