"overall impressive" is a correct and usable phrase in written English.
You can use it to describe something that has impressed you after taking all aspects of it into account. For example, you might say "The company's overall impressive performance earned them a spot in the top 10 of their industry."
Despite these wide ranges, no BAC had less than 4.5× coverage and contributed to the overall impressive assembly statistics.
The overall impressive decreases in injury rates mask disparities by gender, socioeconomic background and ethnicity (Mytton et al. 2012).
Despite an overall impressive amount of investigations, the pathogenesis of NPSLE is poorly understood.
The overall impressive efficacy of gene therapy for PIDs, when compared to that obtained by transplantation with non-HLA-identical HSCs, provides a strong argument in favour of continued exploration of this therapeutic approach.
As seen in Table 5, the Y205Aβ mutant enzyme manifests both a significant (ca. 25-fold) increase in kcat and a decrease (10-fold) in KM resulting in an overall impressive 300-fold increase in catalytic efficiency.
That Brianna Rollins, Nia Ali and Kristi Castlin finished 1-2-3 in the 100m hurdles – the first sweep by American women in any event and only the seventh ever in athletics overall – was impressive enough.
The DxOMark team reports the iPhone 6 shows "very good overall exposure, impressive autofocus performance in both low and bright light, good color rendering and nice detail preservation outdoors and indoors".
Overall, some impressive new features that will likely delight users in the fall, when macOS Sierra ships.
The committee developed a number of recommendations but recognized overall the impressive response of the hardworking public health and healthcare communities (10 ).
The production is impressive overall.
(And to be clear, the work of the Yale M.F.A. students was very impressive overall).
