I haven’t tried the Chocomeister so couldn’t say if it was preferable to the velvet Stout so I will leave it to DavidHatton for that comparison, however I would say going by both my memory and my notes that the Velvet Stout is a nice stout.
Also if you‘ve brewed a few kits then please feel free to disregard this but one thing to bare in mind the timing on home brew kit instructions tend to be a tad optimistic. While you will probably get something that won’t kill you (or make you ill for that matter) within 21 days, a good rule of thumb to follow is 2-2-2 that is two weeks in primary (your fermentor) then once bottled leave for two weeks some where warm to carbonate followed by two weeks somewhere cool to condition. Their are lots of exceptions and some yeast strains work quicker and some especially stronger beers need longer to condition but for your standard 4-5% ale this tends to give fairly decent results. Also may be worth checking out this thread for a basic guide to kit brewing.
https://www.thehomebrewforum.co.uk/...de-to-brewing-your-own-beer-from-a-kit.57526/
A final point the temperature at the moment can be a tad problematic if possible try to find somewhere with a relatively consistent temperature preferably in the 17-20°C range, while it probably won’t kill the yeast you tend to get issues with off flavours especially when you go above above 25°C.