Hi depends on how you are motivated, Peleton is the latest development of rollers->turbo trainers-> Zwift now interactive riding. I know cyclists who swear by static training and have embraced power meters and really benefited from early season in developing their summer rides. Often going out and bagging a few european cols.
Yes the bikes are expensive, but try using a cheap turbo and you will quickly tire.
From my point I found turbo training boring and quickly lost interest, however the months of Jan to March are hopless months if you want to ride on the road due to weather and light. So if Peleton hits the spot and suits your lifestyle I would say try it.
Steve