Traditional video baby monitors don't offer the same high-resolution picture quality we're used to seeing on our smartphones and tablets. If you want high-resolution video of your baby, you'll have to go with a Wi-Fi monitor like the NestCam that streams video to your phone or tablet. The Phillips AVENT SCD630 video monitor may not be high-res, but it's the best of the bunch.
The BabySense (and other mattress sensors) require a hard surface under the mattress to work, and they don't work with all mattress types so you'll need to research your mattress to ensure it is compatible. This option is also not good for travel because of these special considerations. This product doesn't have a parent unit which means the alarm happens in the nursery with your little one and could be traumatic to sleeping little ones. If you want a movement device that works well and has a longer life than the wearable options, then the BabySense 7 is a great way to get the job done with minimal fuss.
If you struggle with technology and don't need or want to see your baby from any other location besides your home, you might want to stick with the dedicated monitors that require little setup and have fairly intuitive user interfaces. This isn't to say that most people can't sort out the Wi-Fi monitors, but it is undeniably less work to just plug the camera into an outlet and go than it is to sign up and download software applications.