I used one successfully for a couple weeks although the technique was to charge 4 of the 8 batteries at a time because I didn't want to make a permanent connection. Output amperage is no doubt less than the Delta-Q perhaps but it is a multi-stage charger in all respects.
A real alternative to the Delta-Q may be the "Eagle 48" with a three year warrantee. Specs are similar to the Delta-Q at nearly half the price.
Eagle Charger #4818-onboard by Dual Pro