I'm buying non-ikea gas cooktop (Bosch) and wall oven (30" Whirpool). Anything I should be aware of before purchasing them?

Here the dimensions for the appliances.

Wall Oven:

Dimensions

Depth

26 7/16

Height

28 3/4

Width

30

Cutout Depth

24

Cutout Height

28

Cutout Width

28 1/2

Gas Cooktop:

Overall appliance
dimensions (HxWxD) (in)

+3 13/16'' x 31'' x
21 1/4''

Required cutout size
(HxWxD) (in)

3 13/16'' x 28
15/16'' x 19 1/8''