Excellent piece of kit for indoor training. However NOT for the inexperienced biker as you have to balance on the rollers. It took me a few goes to get used to it. I strongly recommend you do NOT use your cleats to start of with, use trainers until you get the hang of it. Also have a wall to support you until you are well balanced and that you can ride the rollers unaided. Beats the Turbo Trainer by a mile as you have to pay far more attention to what you doing and having to focus very hard which is much better for your riding over all. And as always excellent service from Merlin.
Wish I had bought this sooner. Rollers and frame are solid. The rollers are a steel alloy with a non-slip grey surface, frame made from box section steel. Requires a small amount of easy assembly. Bought to re-hab an ankle injury and avoid riding in the pouring rain. Already done 250 miles in 3 weeks. Easy to set-up, folds away and is much quieter than expected. Cycling resistance is similar to the road but no freewheeling.