The X-man Spark M is a great cube at a reasonable price for its size and performance. OOTB this cube was a tad bit too loose, but a quick adjustment of the tensions solved that immediately. I added a drop or 2 of DNM on the inner layers which made them smoother, and I was good to go!
First off, I'll start with describing the feel of the Spark. the outers are amazingly crunchy and smooth with a low pitched, quiet sound. The inners are sandier and scratchier, but with some lube they become a dream to turn, smooth and effortless to turn. I would recommend this to anyone looking to get into big cubes; you cat go wrong with x-man!
Shipping as usual was great, I received my order one Christmas Eve, after ordering just the day before. I didn't expect my order to some so quickly! thanks to Speedcube for the amazing service