I dealt with for years and never had a bad experience. Additionally, you get very friendly service and very good prices.
Go to ProDigital.com for help. They know everything about Epson.
Get an Epson wide format (13x19) printer like the 2000, 2880 or the 3000 with larger ink cartridges and you will get professional quality and long lasting prints on their papers.
Kodachrome slides are extremely fragile, especially the emulsion side. Do not touch or brush Kodachromes! To prepare them for scanning just blow them off with canned air or dust off.
If you can find a Nikon LS4000 or 5000 scanner they will do a wonderful job.If you can find a batch adapter it is even better, because you can load about 25-30 slides and let it go.
Vuescan software has a very good Kodachrome profile and digital ice-dust remover.
I saw a comment that digital ice does not work with Kodachrome-incorrect. In the Vuescan Pro software under filters you will find the infrared -light, medium etc. use it on light setting.
At a reasonable price it does an excellent job and you can adjust what resolution you would like to get for the slides.
My department did this service for an ivy league university with a large Kodak scanner and all customers were extremely satisfied with the results.
I would not advise the use of any film cleaners, no matter how carefully you use them, they all leave artifacts and lines on the slides. Do not use anything on Kodachrome!!!!!!!!!
Use digital ice on your scanner only, or send them out for scanning.
Copying them takes you away from the original and does not eliminate scratches or dust, but will make your images softer. If your scanner does not have digital ice, and you do not want to send them out for pro scanning, then I would buy a new one. Also, Vue Scan Pro software offers many options for scanning.
It is very difficult to get a refund.
The Epson V700 is a very good scanner, but I use an older 2450 and a Nikon 4000 with the Vuescan software and having excellent scans form both negatives and slides.