Before jumping into binoviewers, you should understand your current telescope very well, where you know how to keep it well collimated. This is particularly the case when binoviewing with a newtonian reflector/dob, where the telescope's collimation can tend to shift and need more frequent adjustment.
The best binoviewing experience will benefit from:
Good basic telescope collimation
Focuser is squared with the tube and secondary
Focuser drawtube does not sag or tilt under heavy weight
Binoviewer is well centered when attached to focuser
Binoviewer is well collimated (this is not something most people can do and quality of binoviewer can impact how precisely collimated it is)
Binoviewer diopters (eyepiece holders) allow for eyepieces to be attached as close to centered as possible
Why all of these considerations for collimation and keeping everything tight and centered? This is because the light cone has to travel through the whole optical system, be split evenly, and remain straight, so that both eyes receive a similar amount of light and a similar, on-axis image. The above factors are all things that can throw off the image. The earlier in your optical system the light cone is thrown out of wack, such as if your telescope's collimation is off, then the negative visual effects are multiplied and exacerbated as the light travels through the components of the system. This usually manifests as one eye getting more light than the other, making it more difficult for your brain/visual cortex to merge the images. Now, there is some leeway where being slightly off will not present a visually appreciable change, but in general, binoviewing has much steeper technical requirements compared to monoviewing.
With monoviewing, it's not very critical that my eyepiece is nicely centered. With binoviewing, you've really got to be on top of the collimation game and be mindful of keeping stuff centered to enjoy the improved comfort of using two eyes. Some people are more sensitive collimation issues and have trouble merging the two images...others are not.
On top of collimation, in newtonians/dobs, you will almost certainly need to use some type of optical corrector or barlow/telecentric barlow in order to reach focus. Without some kind of corrector, you will not be able to reach focus, or the light cone will be too big and get cut off, resulting in aperture loss and light loss.
I find that with binoviewing, it is easier for my mind to take in all of the details of an object at once. Ridiculously more comfortable viewing experience. I liken it to speed reading-- it's easy to speed read when using both eyes at once-- much more difficult when only using one eye. Binoviewing can be heavy on the pocketbook and is technically challenging. If you are not comfortable monoviewing, jumping into binoviewing too quickly might be too stressful.