It's also great for beginners who may not feel confident (yet) in how much weight they can lift or what their form should look like. And FYI, Tonal also gives regular form feedback during your reps, letting you know if you should be further away from or closer to the Tonal for each move.

The Starting Out With Tonal program made it easy to get comfortable and acclimated to the equipment. “Since starting with Tonal, I've lost nearly 100 pounds, and my blood sugar is so much lower. I'm even off of insulin and metformin and don't have to sleep with a CPAP machine anymore.”

As mentioned in the pricing section, getting the most out of your Tonal comes at a cost - a $59.95 monthly membership, to be exact. You'll still be able to use the machine itself without paying the fee, but most users say the machine isn't worth it if you opt against paying the monthly charge.

Cons: Your walls have to meet the requirements to install Tonal. I ran into this issue because I live in a prewar building, and my walls were too thick to detect the studs properly. The other option is to have a stud build out, which requires working with a professional contractor and takes up more time and money.

Bottom line: Tonal is better for strength training and heavy lifting focus. Mirror is ideal for motivation and a wide variety of cardio classes.

If you cancel the membership after the initial 12-month commitment period, you will lose access to Tonal's intelligence and personalization features as well as the workout library, but you would still have access to basic Tonal features: The weight dial and ability to increase/decrease the weight.

Still, Tonal is on to something, and has a laundry list of all-star investors including Amazon, LeBron James and Serena Williams. It's easy to see why they love it, but the real challenge will be getting the price to a place where it doesn't feel so heavy for the average person to lift.

As mentioned in the pricing section, getting the most out of your Tonal comes at a cost - a $59.95 monthly membership, to be exact. You'll still be able to use the machine itself without paying the fee, but most users say the machine isn't worth it if you opt against paying the monthly charge.

Without a Tonal membership, your experience will feel significantly different. Don't worry–you can still workout on Tonal with Basic Lift and use your Smart Accessories, and Tonal will keep track of your rep count and workout time. You'll have three basic movements to choose from: handle, bar, or rope.

In the press release announcing Williams' expanded relationship with the company, she said of Tonal, “It's a different way to train that challenges me and makes me a lot stronger.”

The camera on Tonal is not used during a live workout, and while the coach will not be able to see you, they will see your workout progress, PRs, and milestones.

If you don't have an active Tonal membership, you can only access the basic lift mode on Tonal. With basic lift, while you can still workout, you'll have access to limited features.