Looks pretty good, moreso for buying components to make your own rather than ordering custom cables, though. Price-wise, the cable and connector prices are very good. It will cost you about an extra $10 for an average length cable to have them custom built above the cost of the components. That's reasonable for excellent solder work, but a bit much for a Speakon-equipped speaker cable that doesn't require expertise to construct well. It also gets a bit steep if you need a bunch of pedalboard patch cables, though I suppose one could ask about quantity discounts. It looks like you could probably get a Series connector cable for a very reasonable price. Also, he has excellent prices on HDMI cables for everyone who is upgrading their home entertainment system this holiday season.
I'd give the website an 8 out of 10. He could use more pics, especially of the RedCo products. I always like to see the inside of connectors to know how they are constructed and what kind of effort will be taken to put them together. I prefer the less bulky G&H connectors over the Neutrik, especially for 1/4 right angle, but Redco doesn't list them so the quality of the Redco brand version matters to me.
The Lava Cable site that was promoted a month or two ago included info about the build facility and methods, and about the qualifications of the builder. Both were a nice touch to build confidence in an otherwise unknown company.
Finally, a page of info describing shipping charges would be nice. It appears that charges are reasonable based upon weight rather than cost, and that USPS Priority Mail might be the best choice.
I may contact him to find out more about the Redco branded products and see if he can get G&H connectors.