We use the following reagents from Quotient:
complement control cells; A1 ,A2, and B cells; Antisera for Fya, M, N, Lea, and Leb; and their 16 cell panel
The only issue I've had with them is a recall of Anti-N last year that left it backordered for ~4 months. Their complement control cells seem to produce stronger reactions than Immucor's in my experience.