Definitely give the Tetenal a try. Quality is fantastic, and it is very easy to use. Plus, it is a long established product that goes back at least 20 years - my pop photos from the early 1990's have the Tetenal kits advertised. Not so for the Rollei. Also, you can order the 1L kit to try out, for reasonable cost and inexpensive shipping from Freestyle. Dont worry, the Haz Mat shipping on the 5L kit is still only around $10-15.